Difference between revisions of "M103"

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{{Specs-Card|code=us_m103}}
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{{Specs-Card
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|code=us_m103
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|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.png}}
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}}
  
 
== Description ==
 
== Description ==
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''In the description, the first part needs to be about the history of the creation and combat usage of the vehicle, as well as its key features. In the second part, tell the reader about the ground vehicle in the game. Insert the screenshot of the vehicle. If the novice player does not remember the vehicle by name, they will immediately understand what kind of vehicle it is talking about.''
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<!-- ''In the description, the first part should be about the history of the creation and combat usage of the vehicle, as well as its key features. In the second part, tell the reader about the ground vehicle in the game. Insert a screenshot of the vehicle, so that if the novice player does not remember the vehicle by name, he will immediately understand what kind of vehicle the article is talking about.'' -->
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During the Berlin Victory Parade of 1945, American and British representatives witnessed the debut of the Soviet [[IS-3]] heavy tank. Concerned about how protected the IS-3 may be against Allied tanks of the time, the Americans began considering a tank design with the firepower capable of tackling the tank. By 1948, the new tank project began as the T43, utilizing American experience developing heavy tanks during World War II. Development of the tank expedited when the Korean War started, showcasing the urgent need for well-armed tanks to counter Soviet ones. As such, the T43 tanks began production even before testing was fully completed, resulting in a lengthy period of rebuilds as faults were discovered and incorporated into the design. Ultimately, 300 T43 and T43E1s were produced and standardized as the '''M103''', with 80 going to the US Army and 220 going to the US Marine Corps. The heavy tanks remained in service until 1974.
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Introduced alongside the American ground tech tree in [[Update 1.45 "Steel Generals"]], the M103 is armed with a monstrous 120 mm gun. Thanks to its powerful 120 mm gun with HEAT rounds, the tank can engage any target it encounters. However, the entire gameplay with the M103 revolves around its gun, as its decent armour is more of a bonus than an advantage, given that many opponents have HEAT and APDS rounds capable of penetrating its frontal armour without much difficulty. In such situations, the tank's rounded armour shapes with varying thickness often lead to enemy shots ricocheting. Furthermore, the M103's mobility is a weak point, as it struggles to keep up with most allies.
  
 
== General info ==
 
== General info ==
 
=== Survivability and armour ===
 
=== Survivability and armour ===
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''Describe armour protection. Note the most well protected and key weak areas. Appreciate the layout of modules as well as the number and location of crew members. Is the level of armour protection sufficient, is the placement of modules helpfull for survival in combat?''
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{{Specs-Tank-Armour}}
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<!-- ''Describe armour protection. Note the most well protected and key weak areas. Appreciate the layout of modules as well as the number and location of crew members. Is the level of armour protection sufficient, is the placement of modules helpful for survival in combat? If necessary use a visual template to indicate the most secure and weak zones of the armour.'' -->
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'''Armour type:'''
  
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''If necessary use a visual template to indicate the most secure and weak zones of the armour.''
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* Cast homogeneous armour
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* Rolled homogeneous armour (Turret roof)
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 +
{| class="wikitable"
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|-
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! Armour !! Front (Slope angle) !! Sides !! Rear !! Roof
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|-
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| Hull || 114.3 mm (55-66°) || 50.8 mm ''Upper'' <br> 44.44 mm ''Lower''|| 38 mm || 25.4 mm
 +
|-
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| Turret || 127 - 350 mm || 76.2 - 93 mm || 51 mm || 38 mm
 +
|}
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'''Notes:'''
 +
 
 +
* Suspension wheels are 20 mm thick and tracks are 30 mm thick.
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 +
'''Hull armour:''' After the fantastic T32, the M103's armour situation is generally a letdown. Its side armour is nearly nonexistent, same applying to the rear. The M103's turret size was also increased while reducing the armour down from 152 mm to ~85 mm average. But all hope is not lost - the M103's armour design did improve. Unlike its predecessor, it features slopes and angles everywhere, making the M103 a difficult target to destroy from the front. It is also reassuring to know that the frontal chassis is no longer a big weak spot; it is relatively minor and can reliably bounce shots right into the armoured gun mantlet.
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 +
'''Turret armour:''' The M103's turret fares better. It is designed to take on tanks from the front, as the line of sight thickness exceeds 300 mm on many occasions and where it doesn't the angle will result in bounces. However, this only works when facing straight at the enemy. Any slight angling miscalculation and the Line of Sight armour becomes useless. Penetration on the turret results to catastrophic damage and leaves 2 crews left
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 +
'''Weak spots:''' The worst part of the M103 is its true weak spots. As mentioned previously, the upper glacis and lower gun mantlet tend to bounce shots into each other, often with deadly results. Furthermore, the bottom turret cheeks are not as well angled as the rest of the turret (~176 mm) and can even be penetrated by the [[KwK 43 (88 mm)|long 88 mm KwK43]]. The biggest issue present is the abnormally large turret ring. It is visible all around the tank, and with merely 127 mm of armour it attracts many shots. This, in combination with the "shot trap", presents a very deadly scenario: Either the enemy hits the turret ring and incapacitates the entire crew with one APHE shell, or the shell strikes the mantlet/glacis and still does massive damage to either the driver's compartment or the gun breech. Keep the turret ring hidden. Another small weakness is that the M103's belly armour is only 38.1 mm thick, meaning most high-explosive rounds used by the Rank V tanks, HESH, can be splashed under the M103 and actually penetrate it with the explosion alone.
  
 
=== Mobility ===
 
=== Mobility ===
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''Write about the mobility of the ground vehicle. Estimate the specific power and maneuverability as well as the maximum speed forward and backward.''
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{{Specs-Tank-Mobility}}
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<!-- ''Write about the mobility of the ground vehicle. Estimate the specific power and manoeuvrability, as well as the maximum speed forwards and backwards.'' -->
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{{tankMobility|abMinHp=1,046|rbMinHp=716}}
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=== Modifications and economy ===
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{{Specs-Economy}}
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It comes without question that this tank, whose sole defining aspect is its gun, should rely first on parts to keep the barrel smoking. For the second upgrade, which also unlocks other tier two upgrades, "Turret Drive" is recommended. The M103 has no mobility problems and therefore tracks can generally be neglected. However, its second tier unlocks are very useful. "FPE" is beneficial against the fires caused by the engine, but the 380 mm penetration HEAT shells and "Adjustment of Fire" for better accuracy are nothing to ignore. When choosing upgrades, ask this question: Is the normal APBC shot enough? Would I have benefited from being able to put out a fire? Does better accuracy help me to get more targets? Choose wisely. After all these three modules are researched, there is not a lot left. "Elevation Mechanism" is always nice, same for "Engine" and "Transmission".
  
 
== Armaments ==
 
== Armaments ==
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{{Specs-Tank-Armaments}}
 
=== Main armament ===
 
=== Main armament ===
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''Give the reader information about the characteristics of the main gun. Assess its effectiveness in a battle based on the reloading speed, ballistics and the power of shells. Do not forget about the flexibilty of the fire, that is how quickly the cannon can be aimed at the target, open fire on it and aim at another enemy. Add a link to the main article on the gun: <code><nowiki>{{main|Name of the weapon}}</nowiki></code>. Describe in general terms the ammunition available for the main gun. Give advice on how to use them and how to fill the ammunition storage.''
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{{Specs-Tank-Weapon|1}}
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<!-- ''Give the reader information about the characteristics of the main gun. Assess its effectiveness in a battle based on the reloading speed, ballistics and the power of shells. Do not forget about the flexibility of the fire, that is how quickly the cannon can be aimed at the target, open fire on it and aim at another enemy. Add a link to the main article on the gun: <code><nowiki>{{main|Name of the weapon}}</nowiki></code>. Describe in general terms the ammunition available for the main gun. Give advice on how to use them and how to fill the ammunition storage.'' -->
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{{main|M58 (120 mm)}}
  
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=== Additional armament ===
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{| class="wikitable" style="text-align:center" width="100%"
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''Some tanks are armed with several guns in one or more turrets. Evaluate the additional weaponry and give advice on its use. Describe the ammunition available for additional weaponry. Give advice on how to use them and how to fill the ammunition storage. If there is no additional weaponry remove this subsection.''
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|-
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! colspan="5" | [[M58 (120 mm)|120 mm M58]] || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
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|-
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! Mode !! Capacity !! Vertical !! Horizontal !! Stabilizer
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! Stock !! Upgraded !! Full !! Expert !! Aced
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! Stock !! Full !! Expert !! Aced
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|-
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! ''Arcade''
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| rowspan="2" | 33 || rowspan="2" | -8°/+15° || rowspan="2" | ±180° || rowspan="2" | N/A || 19.4 || 26.9 || 32.6 || 36.1 || 38.4 || rowspan="2" | 19.37 || rowspan="2" | 17.14 || rowspan="2" | 15.79 || rowspan="2" | 14.90
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|-
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! ''Realistic''
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| 14.3 || 16.8 || 20.4 || 22.6 || 24.0
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|-
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|}
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==== Ammunition ====
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{{:M58 (120 mm)/Ammunition|M358 shot, M356 shell, M469 shell, M357}}
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==== [[Ammo racks]] ====
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[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]
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<!-- '''Last updated:''' -->
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{| class="wikitable" style="text-align:center"
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|-
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! Full<br>ammo
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! Ammo<br>part
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! 1st<br>rack empty
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! 2nd<br>rack empty
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! 3rd<br>rack empty
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! 4th<br>rack empty
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! Visual<br>discrepancy
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|-
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| '''33''' || ''Projectiles''<br>''Propellants'' || 12&nbsp;''(+21)''<br> 24&nbsp;''(+9)'' || 1&nbsp;''(+32)'' <br> 14&nbsp;''(+19)''|| &nbsp;<br> 10&nbsp;''(+23)'' || &nbsp;<br> 1&nbsp;''(+32)'' || No
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|-
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|}
  
 
=== Machine guns ===
 
=== Machine guns ===
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''Offensive and anti-aircraft machine guns not only allow you to fight some aircraft, but also are effective against lightly armoured vehicles. Evaluate machine guns and give recommendations on its use.''
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{{Specs-Tank-Weapon|2}}
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{{Specs-Tank-Weapon|3}}
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<!-- ''Offensive and anti-aircraft machine guns not only allow you to fight some aircraft but also are effective against lightly armoured vehicles. Evaluate machine guns and give recommendations on its use.'' -->
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{{main|M2HB (12.7 mm)|M1919A4 (7.62 mm)}}
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{| class="wikitable" style="text-align:center" width="50%"
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|-
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! colspan="5" | [[M2HB (12.7 mm)|12.7 mm M2HB]]
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|-
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! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
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|-
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| Pintle || 1,000 (200) || 576 || -10°/+45° || ±60°
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|-
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|}
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{| class="wikitable" style="text-align:center" width="50%"
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|-
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! colspan="5" | [[M1919A4 (7.62 mm)|7.62 mm M1919A4]]
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|-
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! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
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|-
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| Coaxial || 4,000 (250) || 500 || N/A || N/A
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|-
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| Coaxial || 4,000 (250) || 500 || N/A || N/A
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|-
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|}
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== Usage in battles ==
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<!-- ''Describe the tactics of playing in the vehicle, the features of using vehicles in the team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view but instead give the reader food for thought. Describe the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).'' -->
 +
Armed with an extremely large 120 mm cannon, the tank boasts superior firepower rivalling many other Rank V vehicles. One thing must be said from the start: this tank is all about the cannon, a ''Gun tank''. This defines the general play style of the tank in both [[Arcade Battles|arcade]] and [[Realistic Battles|realistic mode]]: it is a sniper with the sole role of making the enemy's life as miserable and short-lived as possible. The cannon can compete against the armour of the [[Maus]].
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One thing to note is that the M103's play style is very different from its predecessor T32. Aside from the increase in firepower with the 120 mm cannon, the armour on the M103 is actually slightly weaker than the T32. The M103's gun mantlet is still good with ~300 mm line of sight thickness, but any other spot on the tank is weaker. The tank's upper glacis is, however, a major improvement and mostly a ricochet zone. If impacted, the shells usually travel straight into the turret or gun. Against later Soviet and German tanks, the front of the M103 is vulnerable. Even by using the "hull down" tactic as with the T32, the tank can still be penetrated. However, half-turret down will net better results. The sides, as on most US tanks, are still very thin and vulnerable with no major changes from previous models.
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 +
However, the armour of the M103 is not all bad; while it is not thick, the way it angles will deflect many shots. A badly placed shot will easily ricochet, or be swallowed by the line of sight thickness. A head-on engagement is the M103's greatest strength as its frontal armour performs similarly to the [[IS-3]]'s frontal pike nose. Due to the shape of the hull, it being boat-like, you may bounce some low calibre shells off the lower side of your hull.
 +
 
 +
With range, the advantages of the M103 increase while its disadvantages recede. It is, therefore, the perfect tank for large, open maps like Mozdok and Kursk, where flanking tanks can easily be spotted and dealt with
 +
 
 +
===Tactics===
 +
The M103 is best played at medium to long range, making use of its 120 mm cannon to devastate enemies at a long distance. The vehicle's armour is more about slope than actual thickness, so the long distance also helps to mitigate the M103's rather large armour gaps. The tank also has good gun depression, so making use of hills is advised wherever possible. If on a city map, and have no long-range opportunities, stay close to teammates and move up only as warranted. The 120 mm has a fairly long reload, and in close quarters, can get the M103 destroyed during the downtime. As such, keep a back-up plan an escape route handy, as a missed, bounced, or non-lethal shot can leave the M103 exposed to enemy return fire.
  
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== Usage in the battles ==
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The M103 also comes with a smoke round in case it's needed, but unless it's used to cover a pre-engagement advance, it's best to keep it in reserve only. The long reload of the gun can make loading a smoke round a fatal error, should the M103 get caught mid-reload, or worse, have to cease a reload halfway through to load a more suitable round.
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''Describe the tactics of playing in the vehicle, the features of using vehicles in the team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view but give the reader food for thought. Describe the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).''
 
  
 
=== Pros and cons ===
 
=== Pros and cons ===
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''Summarize and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in a bulleted list. Do not use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - they have a substitution in the form of softer "inadequate", "effective".''
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<!-- ''Summarise and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in a bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".'' -->
  
 
'''Pros:'''
 
'''Pros:'''
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*
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 +
* Access to one of the most powerful solid shot rounds in the game
 +
* Decent gun depression
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* Very fast turret traverse rate for a heavy tank
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* Good mobility for a heavy tank
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* Equipped with a rangefinder
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* Ballistically well-shaped turret and hull front with thick effective armour
 +
* The APBC shell has good post-penetration, even without explosive filler
  
 
'''Cons:'''
 
'''Cons:'''
−
*
+
 
 +
* Limited ammunition capacity
 +
* Long reload time
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* Large and vulnerable turret ring
 +
* Very weak side and rear turret and hull armour
 +
* The cupola is a weak spot
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* Uncapped APBC shell performs poorly against sloped armour
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* The HEATFS round has poor post-penetration damage
  
 
== History ==
 
== History ==
−
''Describe the history of the creation and combat usage of the ground vehicle in more detail than in the introduction. If the historical reference turns out to be too big, take it to a separate article, taking a link to an article about the vehicle and adding a block "/historical reference" (example: https://wiki.warthunder.com/Name-vehicles/historical reference) and add a link to it here using the <code>main</code> template. Be sure to include links to sources at the end of the article.''
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<!-- ''Describe the history of the creation and combat usage of the vehicle in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->
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===Development===
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The '''M103''' tank was designed to counter the Soviet heavy tanks being produced at the time, namely the [[IS-3]] and the [[T-10M]] heavy tanks, which prove rather impervious to Western tank designs such as the [[M26|M26 Pershing]] and [[Centurion Mk 3|Centurion]]. The problem facing the designers at the time was to produce a versatile tank system capable of engaging heavy tanks like the IS-3 and fortifications.
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The result of the request for such of a vehicle was the experimental T34 heavy tank, which was a variant of the then-experimental [[T29|T29 Heavy tank]] except mounting the much larger 120 mm T53 cannon rather than a 105 mm T5E2 cannon. Further development began on this tank in 1948, where multiple changes were made to the design to fit a more versatile tank system. The end result was the now named T43 Heavy Tank, which began to see the doubt in its success as the Korean War was undergoing at the time that placed the [[M26|M26 Pershing]] back in the spotlight. The T43 managed to survive due to an order request of 80 units by the Army to reinforce their depleted armoured forces. The USMC even sought a replacement that could serve for a long period of time and ordered 220 of the vehicle in 1951. Changes were made to the armour protection and the gun was updated to the newer 120 mm T123E1 cannon. After being sent to Aberdeen Proving Ground and approved, it was accepted under the T43E1 designation.
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The [[M58 (120 mm)|120 mm T123E1 cannon]] (adopted as the M58 gun) was a very large cannon, and the ammo could penetrate about 340 mm of armour up to 1,000 yards. However, the ammo's large size restricted the number that could be held in the tank turret and hull. The design also had a 7.62 mm machine gun and a .50 cal machine gun could be installed on the turret to provide anti-aircraft and anti-personnel fire. The heavy weight of the design at 59 tons caused the Continental AV1790 engine to be insufficient in propelling the tank. Thus, the tank's speed was only about 34 km/h (21 mph). Despite the weight, it was still 10 tons lighter than its predecessors and retained about the same armour protection ratings. The production of the T43E1 tank was designated as the '''M103''' tank and was produced at Chrysler Newark for a total of 300 units produced.
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 +
===Deployment===
 +
The M103 was fielded in Europe in only one battalion in January 1958. The 889th Tank Battalion (later as the 2nd Battalion, 33rd Armor Regiment) was organized to four companies of six platoons each. Each platoon had three M103 heavy tanks for eighteen tanks per company. The United States Marine Corps had one M103 company of about seventeen tanks assigned to each of its three Marine tank battalions in regulars and reserves.
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 +
The M103 never saw combat during its service life from 1957 to 1974 and the US Heavy Tank Battalions began to be deactivated around 1963 with the arrival of the [[M60|M60 Main Battle Tank]], which proved to be much better in the long terms compared to the M103. The Marines kept their M103s until they began receiving the M60 tanks to replace them. The removal of the heavy tank units in the US military was the time of turnover from the traditional classification of weight between a tank to the new concept of "main battle tanks" and "airborne vehicles". These ushers in the new age of main battle tanks that can serve in a multi-purpose role against armour and fortifications, starting in the M60 tank, then in its successor the M1 Abrams. The M1 Abrams, while having the same calibre as the M103, was much more powerful due to its new ammunition types and design, and was a statement on the advancement of technology that came in about thirty years difference between the two tank designs.
 +
 
 +
Today, only a few M103 samples are left intact around America in various bases and museums.
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 +
{{break}}
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{{Navigation-Start|{{Annotation|Archive of the in-game description|An archive of the historical description of the vehicle that was presented in-game prior to Update 1.55 'Royal Armour'}}}}
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{{Navigation-First-Simple-Line}}
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By the end of the Second World War the M26 Pershing was the primary heavy tank for the American armed forces, though it was later redesignated a medium tank. The US at the same time was working on new heavy tanks, creating the T29, T30, T34, and T32 prototypes.
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 +
Having released the first T43 pilot model for testing in the summer of 1951, the Detroit Tank Arsenal (Chrysler) introduced a large number of changes to the project. The three subsequent pilot models were designated T43E1s, and worth noting among the significant changes made was the new 120 mm M58 (T123) cannon. New barrel production technology boosted pressure in the chamber as well as initial velocity. The M103's hull and turret were built as intricate, bulky molded pieces with flat welded armour plates on the bottom. The traditional design featured the power unit and transmission in the rear.
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 +
After testing began in 1953 for the pilot and production models, 98 changes were made to the design. In April 1956 the tank was standardized and sent to production as the 120 mm Gun Full-Tracked Combat Tank M103. In all, 74 of the first 80 T43E1 tanks were updated to meet M103 standards.
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 +
Operations in Europe uncovered yet another list of problems plaguing the tank: difficult working conditions for the crew, an underpowered engine that overworked both it and the transmission, a barrel that quickly showed wear when frequently firing armour-piercing rounds, and much more.
 +
 
 +
The Marine Corps later ordered a final modernization for the tank: after the basic M60 was accepted, its diesel engine and fire control system were adapted. The new model was designated the M103A2.
 +
{{Navigation-End}}
  
 
== Media ==
 
== Media ==
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''An excellent addition to the article will be video guides, as well as screenshots from the game and photos.''
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<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' -->
  
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== Read also ==
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;Skins
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''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example,''
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 +
* [https://live.warthunder.com/feed/camouflages/?vehicle=us_m103 Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]
 +
 
 +
;Videos
 +
{{Youtube-gallery|t1sKLWBTNMI|'''M103 - An American Doom Cannon''' - ''JustinPlaysYT''}}
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 +
== See also ==
 +
<!-- ''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
 
* ''reference to the series of the vehicles;''
 
* ''reference to the series of the vehicles;''
−
* ''links to approximate analogues of other nations and research trees.''
+
* ''links to approximate analogues of other nations and research trees.'' -->
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''ETC.''
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 +
* [[Conqueror]] - British counterpart of the heavy tanks, using the same gun design.
  
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== Sources ==
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== External links ==
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''Paste links to sources and external resources, such as:''
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<!-- ''Paste links to sources and external resources, such as:''
 
* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
−
* ''page on the Wikipedia;''
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* ''other literature.'' -->
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* ''other literature.''
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 +
* [[wt:en/devblog/current/680/|[Devblog] Steel Generals: M103 Heavy Tank]]
 +
* [[wt:en/devblog/current/731/|[Devblog] Developers about the M103 Heavy Tank]]
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 +
{{USA heavy tanks}}

Latest revision as of 17:02, 5 July 2024

Rank VI USA | Premium | Golden Eagles
A-10A Thunderbolt (Early)
M103
us_m103.png
GarageImage M103.jpg
ArtImage M103.png
M103
USA flag.png USA
V Rank
Battle rating:
AB RB SB
7.7 7.7 7.7
Class:
Research:105 000 Specs-Card-Exp.png
Purchase:300 000 Specs-Card-Lion.png
Show in game

Description

During the Berlin Victory Parade of 1945, American and British representatives witnessed the debut of the Soviet IS-3 heavy tank. Concerned about how protected the IS-3 may be against Allied tanks of the time, the Americans began considering a tank design with the firepower capable of tackling the tank. By 1948, the new tank project began as the T43, utilizing American experience developing heavy tanks during World War II. Development of the tank expedited when the Korean War started, showcasing the urgent need for well-armed tanks to counter Soviet ones. As such, the T43 tanks began production even before testing was fully completed, resulting in a lengthy period of rebuilds as faults were discovered and incorporated into the design. Ultimately, 300 T43 and T43E1s were produced and standardized as the M103, with 80 going to the US Army and 220 going to the US Marine Corps. The heavy tanks remained in service until 1974.

Introduced alongside the American ground tech tree in Update 1.45 "Steel Generals", the M103 is armed with a monstrous 120 mm gun. Thanks to its powerful 120 mm gun with HEAT rounds, the tank can engage any target it encounters. However, the entire gameplay with the M103 revolves around its gun, as its decent armour is more of a bonus than an advantage, given that many opponents have HEAT and APDS rounds capable of penetrating its frontal armour without much difficulty. In such situations, the tank's rounded armour shapes with varying thickness often lead to enemy shots ricocheting. Furthermore, the M103's mobility is a weak point, as it struggles to keep up with most allies.

General info

Survivability and armour

Armourfront / side / back
Hull127 / 51 / 38
Turret162 / 159 / 58
Crew5 people
Visibility214 %

Armour type:

  • Cast homogeneous armour
  • Rolled homogeneous armour (Turret roof)
Armour Front (Slope angle) Sides Rear Roof
Hull 114.3 mm (55-66°) 50.8 mm Upper
44.44 mm Lower		 38 mm 25.4 mm
Turret 127 - 350 mm 76.2 - 93 mm 51 mm 38 mm

Notes:

  • Suspension wheels are 20 mm thick and tracks are 30 mm thick.

Hull armour: After the fantastic T32, the M103's armour situation is generally a letdown. Its side armour is nearly nonexistent, same applying to the rear. The M103's turret size was also increased while reducing the armour down from 152 mm to ~85 mm average. But all hope is not lost - the M103's armour design did improve. Unlike its predecessor, it features slopes and angles everywhere, making the M103 a difficult target to destroy from the front. It is also reassuring to know that the frontal chassis is no longer a big weak spot; it is relatively minor and can reliably bounce shots right into the armoured gun mantlet.

Turret armour: The M103's turret fares better. It is designed to take on tanks from the front, as the line of sight thickness exceeds 300 mm on many occasions and where it doesn't the angle will result in bounces. However, this only works when facing straight at the enemy. Any slight angling miscalculation and the Line of Sight armour becomes useless. Penetration on the turret results to catastrophic damage and leaves 2 crews left

Weak spots: The worst part of the M103 is its true weak spots. As mentioned previously, the upper glacis and lower gun mantlet tend to bounce shots into each other, often with deadly results. Furthermore, the bottom turret cheeks are not as well angled as the rest of the turret (~176 mm) and can even be penetrated by the long 88 mm KwK43. The biggest issue present is the abnormally large turret ring. It is visible all around the tank, and with merely 127 mm of armour it attracts many shots. This, in combination with the "shot trap", presents a very deadly scenario: Either the enemy hits the turret ring and incapacitates the entire crew with one APHE shell, or the shell strikes the mantlet/glacis and still does massive damage to either the driver's compartment or the gun breech. Keep the turret ring hidden. Another small weakness is that the M103's belly armour is only 38.1 mm thick, meaning most high-explosive rounds used by the Rank V tanks, HESH, can be splashed under the M103 and actually penetrate it with the explosion alone.

Mobility

Speedforward / back
AB36 / 9 km/h
RB and SB34 / 9 km/h
Number of gears6 forward
2 back
Weight56.7 t
Engine power
AB1 545 hp
RB and SB810 hp
Power-to-weight ratio
AB27.2 hp/t
RB and SB14.3 hp/t
Game Mode Max Speed (km/h) Weight (tons) Engine power (horsepower) Power-to-weight ratio (hp/ton)
Forward Reverse Stock Upgraded Stock Upgraded
Arcade 36 9 56.7 1,046 1,545 18.45 27.25
Realistic 34 9 716 810 12.63 14.29

Modifications and economy

Repair costBasic → Reference
AB5 600 → 7 067 Sl icon.png
RB5 931 → 7 484 Sl icon.png
SB9 446 → 11 920 Sl icon.png
Total cost of modifications87 700 Rp icon.png
146 400 Sl icon.png
Talisman cost2 100 Ge icon.png
Crew training86 000 Sl icon.png
Experts300 000 Sl icon.png
Aces1 200 Ge icon.png
Research Aces720 000 Rp icon.png
Reward for battleAB / RB / SB
150 / 200 / 240 % Sl icon.png
196 / 196 / 196 % Rp icon.png
Modifications
Mobility Protection Firepower
Mods new tank traks.png
Tracks
Research:
6 100 Rp icon.png
Cost:
9 800 Sl icon.png
230 Ge icon.png
Mods new tank suspension.png
Suspension
Research:
4 100 Rp icon.png
Cost:
6 600 Sl icon.png
155 Ge icon.png
Mods new tank break.png
Brake System
Research:
4 100 Rp icon.png
Cost:
6 600 Sl icon.png
155 Ge icon.png
Mods new tank filter.png
Filters
Research:
7 600 Rp icon.png
Cost:
12 000 Sl icon.png
290 Ge icon.png
Mods new tank transmission.png
Transmission
Research:
7 400 Rp icon.png
Cost:
12 000 Sl icon.png
280 Ge icon.png
Mods new tank engine.png
Engine
Research:
7 400 Rp icon.png
Cost:
12 000 Sl icon.png
280 Ge icon.png
Mods tank tool kit.png
Improved Parts
Research:
4 000 Rp icon.png
Cost:
9 800 Sl icon.png
230 Ge icon.png
Mods extinguisher.png
Improved FPE
Research:
2 700 Rp icon.png
Cost:
6 600 Sl icon.png
155 Ge icon.png
Mods tank reinforcement us.png
Crew Replenishment
Research:
7 600 Rp icon.png
Cost:
12 000 Sl icon.png
290 Ge icon.png
Mods new tank horizontal aiming.png
Horizontal Drive
Research:
6 100 Rp icon.png
Cost:
9 800 Sl icon.png
230 Ge icon.png
Mods tank cannon.png
Adjustment of Fire
Research:
4 100 Rp icon.png
Cost:
6 600 Sl icon.png
155 Ge icon.png
Mods tank ammo.png
120mm_usa_M469_HEAT_ammo_pack
Research:
4 100 Rp icon.png
Cost:
6 600 Sl icon.png
155 Ge icon.png
Mods new tank vertical aiming.png
Elevation Mechanism
Research:
7 600 Rp icon.png
Cost:
12 000 Sl icon.png
290 Ge icon.png
Mods tank ammo.png
120mm_us_M357_Smoke_ammo_pack
Research:
7 400 Rp icon.png
Cost:
12 000 Sl icon.png
280 Ge icon.png
Mods tank rangefinder.png
Rangefinder
Research:
7 400 Rp icon.png
Cost:
12 000 Sl icon.png
280 Ge icon.png

It comes without question that this tank, whose sole defining aspect is its gun, should rely first on parts to keep the barrel smoking. For the second upgrade, which also unlocks other tier two upgrades, "Turret Drive" is recommended. The M103 has no mobility problems and therefore tracks can generally be neglected. However, its second tier unlocks are very useful. "FPE" is beneficial against the fires caused by the engine, but the 380 mm penetration HEAT shells and "Adjustment of Fire" for better accuracy are nothing to ignore. When choosing upgrades, ask this question: Is the normal APBC shot enough? Would I have benefited from being able to put out a fire? Does better accuracy help me to get more targets? Choose wisely. After all these three modules are researched, there is not a lot left. "Elevation Mechanism" is always nice, same for "Engine" and "Transmission".

Armaments

Rangefinder
Reduces the error and increases the maximum measurable distance of the rangefinder

Main armament

120 mm M58 cannon
Ammunition33 rounds
Reloadbasic crew → aces
19.4 → 14.9 s
Vertical guidance-8° / 15°
Main article: M58 (120 mm)
120 mm M58 Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 33 -8°/+15° ±180° N/A 19.4 26.9 32.6 36.1 38.4 19.37 17.14 15.79 14.90
Realistic 14.3 16.8 20.4 22.6 24.0

Ammunition

Penetration statistics
Ammunition Type of
warhead 		Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
M358 shot APBC 301 298 286 272 258 245
M356 shell HE 39 39 39 39 39 39
M469 shell HEATFS 380 380 380 380 380 380
Shell details
Ammunition Type of
warhead 		Velocity
(m/s) 		Projectile
mass (kg) 		Fuse delay
(m) 		Fuse sensitivity
(mm) 		Explosive mass
(TNT equivalent) (kg) 		Ricochet
0% 50% 100%
M358 shot APBC 1,067 23.1 - - - 47° 60° 65°
M356 shell HE 762 22.84 0 0.1 4.65 79° 80° 81°
M469 shell HEATFS 1,143 23.81 0.05 0.1 2.67 65° 72° 77°
Smoke shell characteristics
Ammunition Velocity
(m/s) 		Projectile
mass (kg) 		Screen radius
(m) 		Screen deploy
time (s) 		Screen hold
time (s) 		Explosive mass
(TNT equivalent) (g)
M357 762 22.9 20 5 25 50

Ammo racks

Ammo racks of the M103
Full
ammo 		Ammo
part 		1st
rack empty 		2nd
rack empty 		3rd
rack empty 		4th
rack empty 		Visual
discrepancy
33 Projectiles
Propellants 		12 (+21)
24 (+9) 		1 (+32)
14 (+19)		  
10 (+23) 		 
1 (+32) 		No

Machine guns

12.7 mm M2HB machine gun
Ammunition1 000 rounds
Belt capacity200 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Fire rate575 shots/min
Vertical guidance-10° / 45°
Horizontal guidance-60° / 60°
2 x 7.62 mm M1919A4 machine gun (coaxial)
Ammunition8 000 rounds
Belt capacity250 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Fire rate500 shots/min
Main articles: M2HB (12.7 mm), M1919A4 (7.62 mm)
12.7 mm M2HB
Mount Capacity (Belt) Fire rate Vertical Horizontal
Pintle 1,000 (200) 576 -10°/+45° ±60°
7.62 mm M1919A4
Mount Capacity (Belt) Fire rate Vertical Horizontal
Coaxial 4,000 (250) 500 N/A N/A
Coaxial 4,000 (250) 500 N/A N/A

Usage in battles

Armed with an extremely large 120 mm cannon, the tank boasts superior firepower rivalling many other Rank V vehicles. One thing must be said from the start: this tank is all about the cannon, a Gun tank. This defines the general play style of the tank in both arcade and realistic mode: it is a sniper with the sole role of making the enemy's life as miserable and short-lived as possible. The cannon can compete against the armour of the Maus.

One thing to note is that the M103's play style is very different from its predecessor T32. Aside from the increase in firepower with the 120 mm cannon, the armour on the M103 is actually slightly weaker than the T32. The M103's gun mantlet is still good with ~300 mm line of sight thickness, but any other spot on the tank is weaker. The tank's upper glacis is, however, a major improvement and mostly a ricochet zone. If impacted, the shells usually travel straight into the turret or gun. Against later Soviet and German tanks, the front of the M103 is vulnerable. Even by using the "hull down" tactic as with the T32, the tank can still be penetrated. However, half-turret down will net better results. The sides, as on most US tanks, are still very thin and vulnerable with no major changes from previous models.

However, the armour of the M103 is not all bad; while it is not thick, the way it angles will deflect many shots. A badly placed shot will easily ricochet, or be swallowed by the line of sight thickness. A head-on engagement is the M103's greatest strength as its frontal armour performs similarly to the IS-3's frontal pike nose. Due to the shape of the hull, it being boat-like, you may bounce some low calibre shells off the lower side of your hull.

With range, the advantages of the M103 increase while its disadvantages recede. It is, therefore, the perfect tank for large, open maps like Mozdok and Kursk, where flanking tanks can easily be spotted and dealt with

Tactics

The M103 is best played at medium to long range, making use of its 120 mm cannon to devastate enemies at a long distance. The vehicle's armour is more about slope than actual thickness, so the long distance also helps to mitigate the M103's rather large armour gaps. The tank also has good gun depression, so making use of hills is advised wherever possible. If on a city map, and have no long-range opportunities, stay close to teammates and move up only as warranted. The 120 mm has a fairly long reload, and in close quarters, can get the M103 destroyed during the downtime. As such, keep a back-up plan an escape route handy, as a missed, bounced, or non-lethal shot can leave the M103 exposed to enemy return fire.

The M103 also comes with a smoke round in case it's needed, but unless it's used to cover a pre-engagement advance, it's best to keep it in reserve only. The long reload of the gun can make loading a smoke round a fatal error, should the M103 get caught mid-reload, or worse, have to cease a reload halfway through to load a more suitable round.

Pros and cons

Pros:

  • Access to one of the most powerful solid shot rounds in the game
  • Decent gun depression
  • Very fast turret traverse rate for a heavy tank
  • Good mobility for a heavy tank
  • Equipped with a rangefinder
  • Ballistically well-shaped turret and hull front with thick effective armour
  • The APBC shell has good post-penetration, even without explosive filler

Cons:

  • Limited ammunition capacity
  • Long reload time
  • Large and vulnerable turret ring
  • Very weak side and rear turret and hull armour
  • The cupola is a weak spot
  • Uncapped APBC shell performs poorly against sloped armour
  • The HEATFS round has poor post-penetration damage

History

Development

The M103 tank was designed to counter the Soviet heavy tanks being produced at the time, namely the IS-3 and the T-10M heavy tanks, which prove rather impervious to Western tank designs such as the M26 Pershing and Centurion. The problem facing the designers at the time was to produce a versatile tank system capable of engaging heavy tanks like the IS-3 and fortifications.

The result of the request for such of a vehicle was the experimental T34 heavy tank, which was a variant of the then-experimental T29 Heavy tank except mounting the much larger 120 mm T53 cannon rather than a 105 mm T5E2 cannon. Further development began on this tank in 1948, where multiple changes were made to the design to fit a more versatile tank system. The end result was the now named T43 Heavy Tank, which began to see the doubt in its success as the Korean War was undergoing at the time that placed the M26 Pershing back in the spotlight. The T43 managed to survive due to an order request of 80 units by the Army to reinforce their depleted armoured forces. The USMC even sought a replacement that could serve for a long period of time and ordered 220 of the vehicle in 1951. Changes were made to the armour protection and the gun was updated to the newer 120 mm T123E1 cannon. After being sent to Aberdeen Proving Ground and approved, it was accepted under the T43E1 designation.

The 120 mm T123E1 cannon (adopted as the M58 gun) was a very large cannon, and the ammo could penetrate about 340 mm of armour up to 1,000 yards. However, the ammo's large size restricted the number that could be held in the tank turret and hull. The design also had a 7.62 mm machine gun and a .50 cal machine gun could be installed on the turret to provide anti-aircraft and anti-personnel fire. The heavy weight of the design at 59 tons caused the Continental AV1790 engine to be insufficient in propelling the tank. Thus, the tank's speed was only about 34 km/h (21 mph). Despite the weight, it was still 10 tons lighter than its predecessors and retained about the same armour protection ratings. The production of the T43E1 tank was designated as the M103 tank and was produced at Chrysler Newark for a total of 300 units produced.

Deployment

The M103 was fielded in Europe in only one battalion in January 1958. The 889th Tank Battalion (later as the 2nd Battalion, 33rd Armor Regiment) was organized to four companies of six platoons each. Each platoon had three M103 heavy tanks for eighteen tanks per company. The United States Marine Corps had one M103 company of about seventeen tanks assigned to each of its three Marine tank battalions in regulars and reserves.

The M103 never saw combat during its service life from 1957 to 1974 and the US Heavy Tank Battalions began to be deactivated around 1963 with the arrival of the M60 Main Battle Tank, which proved to be much better in the long terms compared to the M103. The Marines kept their M103s until they began receiving the M60 tanks to replace them. The removal of the heavy tank units in the US military was the time of turnover from the traditional classification of weight between a tank to the new concept of "main battle tanks" and "airborne vehicles". These ushers in the new age of main battle tanks that can serve in a multi-purpose role against armour and fortifications, starting in the M60 tank, then in its successor the M1 Abrams. The M1 Abrams, while having the same calibre as the M103, was much more powerful due to its new ammunition types and design, and was a statement on the advancement of technology that came in about thirty years difference between the two tank designs.

Today, only a few M103 samples are left intact around America in various bases and museums.


Archive of the in-game description

By the end of the Second World War the M26 Pershing was the primary heavy tank for the American armed forces, though it was later redesignated a medium tank. The US at the same time was working on new heavy tanks, creating the T29, T30, T34, and T32 prototypes.

Having released the first T43 pilot model for testing in the summer of 1951, the Detroit Tank Arsenal (Chrysler) introduced a large number of changes to the project. The three subsequent pilot models were designated T43E1s, and worth noting among the significant changes made was the new 120 mm M58 (T123) cannon. New barrel production technology boosted pressure in the chamber as well as initial velocity. The M103's hull and turret were built as intricate, bulky molded pieces with flat welded armour plates on the bottom. The traditional design featured the power unit and transmission in the rear.

After testing began in 1953 for the pilot and production models, 98 changes were made to the design. In April 1956 the tank was standardized and sent to production as the 120 mm Gun Full-Tracked Combat Tank M103. In all, 74 of the first 80 T43E1 tanks were updated to meet M103 standards.

Operations in Europe uncovered yet another list of problems plaguing the tank: difficult working conditions for the crew, an underpowered engine that overworked both it and the transmission, a barrel that quickly showed wear when frequently firing armour-piercing rounds, and much more.

The Marine Corps later ordered a final modernization for the tank: after the basic M60 was accepted, its diesel engine and fire control system were adapted. The new model was designated the M103A2.


Media

Skins
Videos
M103 - An American Doom Cannon - JustinPlaysYT

See also

  • Conqueror - British counterpart of the heavy tanks, using the same gun design.

External links


USA heavy tanks
M4 Jumbo  M4A3E2 · Cobra King · M4A3E2 (76) W
M6  M6A1 · T1E1 · T1E1 (90) · M6A2E1
T26  T26E1-1 · T26E5
T29/30/34  T29 · T30 · T34
T32  T32 · T32E1
M103  M103
Others  T14

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