Difference between revisions of "M256 (120 mm)"
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== Description == | == Description == | ||
| − | <!--''Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.''--> | + | <!-- ''Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.'' --> |
The '''120 mm M256''' is an American tank cannon used in its top rank vehicles. It is most famously used by the American M1 Abrams series of tanks since its installation in the [[M1A1 Abrams]] model, though it has saw usage in older American tanks like the [[M60 AMBT|M60]] main battle tank. | The '''120 mm M256''' is an American tank cannon used in its top rank vehicles. It is most famously used by the American M1 Abrams series of tanks since its installation in the [[M1A1 Abrams]] model, though it has saw usage in older American tanks like the [[M60 AMBT|M60]] main battle tank. | ||
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<!-- ''List out vehicles that are equipped with the weapon.'' --> | <!-- ''List out vehicles that are equipped with the weapon.'' --> | ||
| + | * {{Specs-Link|us_m60_120s}} | ||
* {{Specs-Link|us_m60a3_slep}} | * {{Specs-Link|us_m60a3_slep}} | ||
* {{Specs-Link|us_m1a1_abrams}} | * {{Specs-Link|us_m1a1_abrams}} | ||
| + | * {{Specs-Link|us_m1a1_aim_abrams}} | ||
| + | * {{Specs-Link|us_m1a1_hc_usmc}} | ||
| + | * {{Specs-Link|us_m1a1_hc_abrams}} | ||
* {{Specs-Link|us_m1a2_abrams}} | * {{Specs-Link|us_m1a2_abrams}} | ||
| + | * {{Specs-Link|us_m1a2_sep_abrams}} | ||
| + | * {{Specs-Link|us_m1a2_sep2_abrams}} | ||
== General info == | == General info == | ||
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'''American ammunition''' | '''American ammunition''' | ||
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| − | | M830 | ||
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'''Export ammunition''' | '''Export ammunition''' | ||
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| − | + | === Comparison with analogues === | |
| − | + | <!-- ''Give a comparative description of cannons/machine guns that have firepower equal to this weapon.'' --> | |
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* [[File:Germany_flag.png|25px|link=]] [[Rh120 L/44 (120 mm)]] - The original basis of the M256, the Rh120 L/44 matches many aspects of the American gun down to the reload rate. However, the M256 is vastly superior in APFSDS penetration performance due to the M829A1 round. | * [[File:Germany_flag.png|25px|link=]] [[Rh120 L/44 (120 mm)]] - The original basis of the M256, the Rh120 L/44 matches many aspects of the American gun down to the reload rate. However, the M256 is vastly superior in APFSDS penetration performance due to the M829A1 round. | ||
* [[File:Germany_flag.png|25px|link=]] [[Rh120 L/55 (120 mm)]] - An elongated version of the Rh120 L/44, the L/55 can exceed the M256 in APFSDS penetration and muzzle velocity values, but suffers in reload time. | * [[File:Germany_flag.png|25px|link=]] [[Rh120 L/55 (120 mm)]] - An elongated version of the Rh120 L/44, the L/55 can exceed the M256 in APFSDS penetration and muzzle velocity values, but suffers in reload time. | ||
| − | * [[File:USSR_flag.png|25px|link=]] [[2A46M-5 (125 mm)]] - This | + | * [[File:USSR_flag.png|25px|link=]] [[2A46M-5 (125 mm)]] - This Soviet cannon is the only one in the tech tree able to come close to the M256 in APFSDS performance, but is still lacking and has a longer reload time than the M256. However, all of its chemical rounds are superior compared to the HEATFS the M256 can fire. |
| − | * [[File:Britain_flag.png|25px|link=]] [[L30A1 (120 mm)]] - This British cannon comes close to the M256 in terms of APFSDS penetrations alongside a slightly faster reload rate. However the only alternative chemical weapon is HESH, which means the gun must choose to focus in the | + | * [[File:Britain_flag.png|25px|link=]] [[L30A1 (120 mm)]] - This British cannon comes close to the M256 in terms of APFSDS penetrations alongside a slightly faster reload rate. However the only alternative chemical weapon is HESH, which means the gun must choose to focus in the armour-piercing capabilities of the APFSDS rounds or in the explosive powers of the HESH to do its damage. |
| − | * [[File:Japan_flag.png|25px|link=]] [[Type 90 L/44 (120 mm)]] - Another license-production version of the Rh120 L/44, this Japanese cannon is severely lacking compared to the M829A1 round fired by the M256. However, the gun's weapon platform in the Type 90 tanks have autoloaders to allow a way faster | + | * [[File:Japan_flag.png|25px|link=]] [[Type 90 L/44 (120 mm)]] - Another license-production version of the Rh120 L/44, this Japanese cannon is severely lacking compared to the M829A1 round fired by the M256. However, the gun's weapon platform in the Type 90 tanks have autoloaders to allow a way faster rate of fire compared to Rh120 and M256 tanks. |
| − | * [[File:China_flag.png|25px|link=]] [[ZPT98 (125 mm)]] - Like the | + | * [[File:China_flag.png|25px|link=]] [[ZPT98 (125 mm)]] - Like the Soviet 2A46M-5, though this Chinese cannon has a much better APFSDS round available at the cost of a longer reload and no gun-launched ATGM available. |
| − | * [[File:Italy_flag.png|25px|link=]] [[OTO Breda 120/44 (120 mm)]] - This Italian tank cannon fires | + | * [[File:Italy_flag.png|25px|link=]] [[OTO Breda 120/44 (120 mm)]] - This Italian tank cannon fires a fast and hard-hitting APFSDS round out of a 120 mm L/44 cannon, despite having similar handling characteristics as the M256. |
| − | * [[File:France_flag.png|25px|link=]] [[GIAT CN120-26 F1 (120 mm)]] - This French tank cannon has slightly lower APFSDS performance than the M829A1 round, but has a reload rate of 6 seconds between round. Otherwise, performance are quite similar in terms of | + | * [[File:France_flag.png|25px|link=]] [[GIAT CN120-26 F1 (120 mm)]] - This French tank cannon has slightly lower APFSDS performance than the M829A1 round, but has a reload rate of 6 seconds between round. Otherwise, performance are quite similar in terms of HEATFS performance. |
* [[File:Sweden_flag.png|25px|link=]] [[Kan Strv 122 (120 mm)]] - See Rh120 L/44 entry due to near-identical performances. | * [[File:Sweden_flag.png|25px|link=]] [[Kan Strv 122 (120 mm)]] - See Rh120 L/44 entry due to near-identical performances. | ||
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'''Pros:''' | '''Pros:''' | ||
| − | * M829, KE-W (on the M60 AMBT), and | + | * M829, KE-W (on the M60 AMBT), M829A1 (on the M1A1 HC) and M829A2 (on the M1A2) are powerful shells |
| − | * The M256 on the M1A2 Abrams has access to the high velocity, proximity-fused M830A1 {{Annotation|HEAT-MP|High-explosive anti-tank multi-purpose}} shell, enabling the M1A2 to engage helicopters and low flying aircraft | + | * The M256 on the M1A2 Abrams has access to the high velocity, proximity-fused M830A1 {{Annotation|HEAT-MP|High-explosive anti-tank multi-purpose}} shell, enabling the M1A2 to engage helicopters and low flying aircraft |
| − | * Reload is comparable to other NATO MBTs - 7.8 seconds stock and 6 seconds with an aced crew | + | * Reload is comparable to other NATO MBTs - 7.8 seconds stock and 6 seconds with an aced crew |
| − | * Relatively wide selection of shells - | + | * Relatively wide selection of shells - M829 and M830 on the M1A1, M829, M829A1, M830 and M830A1 on the M1A1 HC, M829, M829A2, M830 and M830A1 on the M1A2 Abrams. The M60 AMBT gets access to the powerful KE-W APFSDS shell (which is a tungsten based M829A1 shell, without the depleted uranium tip) and the M830 HEATFS shell |
| − | * M830A1 is | + | * M830A1 is a fast HEATFS shell with a muzzle velocity of 1,400 m/s |
| − | * Extremely high muzzle velocity on M829, KE-W, and | + | * Extremely high muzzle velocity on M829, KE-W, M829A1 and M829A2 makes longe range sniping a satisfying experience |
| − | * Great gun handling characteristics - the gun elevates towards +20 and depresses towards -10 very quickly | + | * Great gun handling characteristics - the gun elevates towards +20 and depresses towards -10 very quickly |
| − | * Very effective stabiliser - does not stop working at high speeds | + | * Very effective stabiliser - does not stop working at high speeds |
'''Cons:''' | '''Cons:''' | ||
| − | * Poor stock grind - enemy tanks are very capable of withstanding M830 HEAT-FS | + | * Poor stock grind - enemy tanks are very capable of withstanding M830 HEAT-FS |
| − | * M830A1 is not effective against enemy MBTs - it only has 350 mm of chemical-based penetration | + | * M830A1 is not effective against enemy MBTs - it only has 350 mm of chemical-based penetration |
| − | * The M256 on the M1A1 Abrams and M60 AMBT do not get access to the M829A1 APFSDS shell and the M830A1 HEAT-MP shell | + | * The M256 on the M1A1 Abrams and M60 AMBT do not get access to the M829A1 APFSDS shell and the M830A1 HEAT-MP shell |
| − | * M830A1 needs to travel a certain distance to arm the fuse - unable to engage helicopters at close range, except for a direct hit | + | * M830A1 needs to travel a certain distance to arm the fuse - unable to engage helicopters at close range, except for a direct hit |
| − | * The reload | + | * Average reload for a NATO tank. The reload time is equal to the Leopard 2A5/6, the Strv 122's, the Ariete's, and the Leclerc's. An aced Challenger 2 and Challenger 2 (2F) can beat you by a full second, the Type 90 and Type 90 (B) (due to their autoloader) by a full 2 or 3 seconds, depending on your crewskill |
| − | * M830A1 self-destructs at 4.5 kilometres - helicopters can engage the M1A2 way beyond that range | + | * M830A1 self-destructs at 4.5 kilometres - helicopters can engage the M1A2 way beyond that range |
| + | * M830A1 requires a direct hit for maximum effectiveness - near hits result in little to no damage to the enemy target | ||
== History == | == History == | ||
| − | <!--''Examine the history of the creation and combat usage of the weapon 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 weapon and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Weapon-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>.''--> | + | <!-- ''Examine the history of the creation and combat usage of the weapon 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 weapon and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Weapon-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>.'' --> |
| − | In 1972, as the | + | In 1972, as the replacement to the cancelled [[MBT-70]] and [[XM-803]] was beginning development by Chrysler and GM, a 120 mm smoothbore gun had been considered. However, the developing gun by West Germany was not expected to be produced in time to meet the scheduled production timeline, and so the [[M68 (105 mm)|105 mm M68]] was retained as the main armament for the upcoming design.<ref name="AbramsHunnicuttpg1">Hunnicutt 1990, p.163</ref> In 1976, during the decision on which company will receive the contract to produce the XM-1 tank, a separate decision was made for the tank to be able to accommodate a 120 mm gun in the future, either the British 120 mm rifled gun or the German smoothbore gun. On October 28th, the XM-1 designs were modified with this new requirement.<ref name="AbramsHunnicuttpg2">Hunnicutt 1990, p.190</ref> Chrysler eventually won the contract to produce the tanks, but they were armed with the [[M68A1 (105 mm)|105 mm M68A1]]. |
[[File:M256 diagram.png|x50px|right|thumb|none|A diagram image of the M256 cannon.]] | [[File:M256 diagram.png|x50px|right|thumb|none|A diagram image of the M256 cannon.]] | ||
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== See also == | == See also == | ||
| − | <!--''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:'' | + | <!-- ''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:'' |
| + | * ''reference to the article about the variant of the cannon/machine gun;'' | ||
| + | * ''references to approximate analogues by other nations and research trees.'' --> | ||
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* [[Rh120 L/44 (120 mm)]] - The cannon the M256 was based off of. | * [[Rh120 L/44 (120 mm)]] - The cannon the M256 was based off of. | ||
== External links == | == External links == | ||
| − | <!--''Paste links to sources and external resources, such as:'' | + | <!-- ''Paste links to sources and external resources, such as:'' |
| + | * ''topic on the official game forum;'' | ||
| + | * ''other literature.'' --> | ||
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* [https://www.inetres.com/gp/military/cv/weapon/M256.html [inetres<nowiki>.com]</nowiki> Gary's Combat Vehicle Reference Guide - M256 120mm Smoothbore Gun] | * [https://www.inetres.com/gp/military/cv/weapon/M256.html [inetres<nowiki>.com]</nowiki> Gary's Combat Vehicle Reference Guide - M256 120mm Smoothbore Gun] | ||
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===References=== | ===References=== | ||
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| + | ;Citations | ||
<references /> | <references /> | ||
| − | + | ;Bibliography | |
* Hunnicutt, R.P. ''Abrams: A History of the American Main Battle Tank.'' Presidio Press, 1990 | * Hunnicutt, R.P. ''Abrams: A History of the American Main Battle Tank.'' Presidio Press, 1990 | ||
Latest revision as of 09:42, 26 June 2024
Contents
Description
The 120 mm M256 is an American tank cannon used in its top rank vehicles. It is most famously used by the American M1 Abrams series of tanks since its installation in the M1A1 Abrams model, though it has saw usage in older American tanks like the M60 main battle tank.
It is based off the Rheinmetall L/44 cannon, though it is license-produced in America with a simplified design.
Vehicles equipped with this weapon
General info
Tell us about the tactical and technical characteristics of the cannon or machine gun.
Available ammunition
American 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 | ||
| M830 | HEATFS | 480 | 480 | 480 | 480 | 480 | 480 |
| M830A1 | HEAT MP | 350 | 350 | 350 | 350 | 350 | 350 |
| M829 | APFSDS | 491 | 488 | 481 | 473 | 464 | 454 |
| M829A1 | APFSDS | 598 | 596 | 589 | 580 | 570 | 560 |
| M829A2 | APFSDS | 629 | 627 | 619 | 610 | 601 | 590 |
| M908 | HE-OR | 300 | 300 | 300 | 300 | 300 | 300 |
| 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% | ||||||||||
| M830 | HEATFS | 1,140 | 13.1 | 0.05 | 0.1 | 2.36 | 65° | 72° | 77° | |||
| M829 | APFSDS | 1,670 | 4.27 | - | - | - | 78° | 80° | 81° | |||
| M829A1 | APFSDS | 1,575 | 4.89 | - | - | - | 78° | 80° | 81° | |||
| M829A2 | APFSDS | 1,680 | 4.92 | - | - | - | 78° | 80° | 81° | |||
| M908 | HE-OR | 1,410 | 11.4 | 0.4 | 5 | 1.99 | 65° | 72° | 77° | |||
| Proximity-fused shell details | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Velocity (m/s) |
Projectile mass (kg) |
Fuse delay (m) |
Fuse sensitivity (mm) |
Arming distance (m) |
Trigger radius (m) |
Explosive mass (TNT equivalent) (kg) |
Ricochet | |||
| 0% | 50% | 100% | ||||||||||
| M830A1 | HEAT MP | 1,410 | 11.4 | 0.05 | 0.1 | 400 | 10 | 1.99 | 65° | 72° | 77° | |
Export 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 | ||
| KE-W | APFSDS | 583 | 579 | 569 | 556 | 542 | 528 |
| 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% | ||||||||||
| KE-W | APFSDS | 1,585 | 4 | - | - | - | 78° | 80° | 81° | |||
Comparison with analogues
-
Rh120 L/44 (120 mm) - The original basis of the M256, the Rh120 L/44 matches many aspects of the American gun down to the reload rate. However, the M256 is vastly superior in APFSDS penetration performance due to the M829A1 round. - Rh120 L/55 (120 mm) - An elongated version of the Rh120 L/44, the L/55 can exceed the M256 in APFSDS penetration and muzzle velocity values, but suffers in reload time.
-
2A46M-5 (125 mm) - This Soviet cannon is the only one in the tech tree able to come close to the M256 in APFSDS performance, but is still lacking and has a longer reload time than the M256. However, all of its chemical rounds are superior compared to the HEATFS the M256 can fire. -
L30A1 (120 mm) - This British cannon comes close to the M256 in terms of APFSDS penetrations alongside a slightly faster reload rate. However the only alternative chemical weapon is HESH, which means the gun must choose to focus in the armour-piercing capabilities of the APFSDS rounds or in the explosive powers of the HESH to do its damage. -
Type 90 L/44 (120 mm) - Another license-production version of the Rh120 L/44, this Japanese cannon is severely lacking compared to the M829A1 round fired by the M256. However, the gun's weapon platform in the Type 90 tanks have autoloaders to allow a way faster rate of fire compared to Rh120 and M256 tanks. -
ZPT98 (125 mm) - Like the Soviet 2A46M-5, though this Chinese cannon has a much better APFSDS round available at the cost of a longer reload and no gun-launched ATGM available. -
OTO Breda 120/44 (120 mm) - This Italian tank cannon fires a fast and hard-hitting APFSDS round out of a 120 mm L/44 cannon, despite having similar handling characteristics as the M256. -
GIAT CN120-26 F1 (120 mm) - This French tank cannon has slightly lower APFSDS performance than the M829A1 round, but has a reload rate of 6 seconds between round. Otherwise, performance are quite similar in terms of HEATFS performance. -
Kan Strv 122 (120 mm) - See Rh120 L/44 entry due to near-identical performances.
Usage in battles
Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.
Pros and cons
Pros:
- M829, KE-W (on the M60 AMBT), M829A1 (on the M1A1 HC) and M829A2 (on the M1A2) are powerful shells
- The M256 on the M1A2 Abrams has access to the high velocity, proximity-fused M830A1 HEAT-MP shell, enabling the M1A2 to engage helicopters and low flying aircraft
- Reload is comparable to other NATO MBTs - 7.8 seconds stock and 6 seconds with an aced crew
- Relatively wide selection of shells - M829 and M830 on the M1A1, M829, M829A1, M830 and M830A1 on the M1A1 HC, M829, M829A2, M830 and M830A1 on the M1A2 Abrams. The M60 AMBT gets access to the powerful KE-W APFSDS shell (which is a tungsten based M829A1 shell, without the depleted uranium tip) and the M830 HEATFS shell
- M830A1 is a fast HEATFS shell with a muzzle velocity of 1,400 m/s
- Extremely high muzzle velocity on M829, KE-W, M829A1 and M829A2 makes longe range sniping a satisfying experience
- Great gun handling characteristics - the gun elevates towards +20 and depresses towards -10 very quickly
- Very effective stabiliser - does not stop working at high speeds
Cons:
- Poor stock grind - enemy tanks are very capable of withstanding M830 HEAT-FS
- M830A1 is not effective against enemy MBTs - it only has 350 mm of chemical-based penetration
- The M256 on the M1A1 Abrams and M60 AMBT do not get access to the M829A1 APFSDS shell and the M830A1 HEAT-MP shell
- M830A1 needs to travel a certain distance to arm the fuse - unable to engage helicopters at close range, except for a direct hit
- Average reload for a NATO tank. The reload time is equal to the Leopard 2A5/6, the Strv 122's, the Ariete's, and the Leclerc's. An aced Challenger 2 and Challenger 2 (2F) can beat you by a full second, the Type 90 and Type 90 (B) (due to their autoloader) by a full 2 or 3 seconds, depending on your crewskill
- M830A1 self-destructs at 4.5 kilometres - helicopters can engage the M1A2 way beyond that range
- M830A1 requires a direct hit for maximum effectiveness - near hits result in little to no damage to the enemy target
History
In 1972, as the replacement to the cancelled MBT-70 and XM-803 was beginning development by Chrysler and GM, a 120 mm smoothbore gun had been considered. However, the developing gun by West Germany was not expected to be produced in time to meet the scheduled production timeline, and so the 105 mm M68 was retained as the main armament for the upcoming design.[1] In 1976, during the decision on which company will receive the contract to produce the XM-1 tank, a separate decision was made for the tank to be able to accommodate a 120 mm gun in the future, either the British 120 mm rifled gun or the German smoothbore gun. On October 28th, the XM-1 designs were modified with this new requirement.[2] Chrysler eventually won the contract to produce the tanks, but they were armed with the 105 mm M68A1.
The German Rheinmetall 120 mm was eventually chosen to become the next tank armament for US tanks. Receiving a license to produce it, the Watervliet Arsenal produced the Rheinmetall cannon as the M256.[3] With the original Rheinmetall design considered overly complex and expensive, the M256 had been redesigned with fewer parts.[4]
Media
Excellent additions to the article would be video guides, screenshots from the game, and photos.
See also
- Rh120 L/44 (120 mm) - The cannon the M256 was based off of.
External links
References
- Citations
- Bibliography
- Hunnicutt, R.P. Abrams: A History of the American Main Battle Tank. Presidio Press, 1990
- Zaloga, Steven. M1 Abrams Main Battle Tank 1982-1992. Osprey Publishing Ltd., 1993
| USA tank cannons | |
|---|---|
| 20 mm | M139 |
| 25 mm | LW25 · M242 |
| 37 mm | M3 · M5 · M6 |
| 57 mm | M1 |
| 75 mm | M2 · M2 Howitzer · M3 · M6 · M1897A4 · XM274 |
| 76 mm | M1 · M7 · M32 · T185E1 |
| 90 mm | M3 · M3A1 · M36 · M41 · M54 · T15E1 · T15E2 · T54 · T208E9 |
| 105 mm | M4 · M68 · M68A1 · M68A1E8 · T5E1 · T5E2 · T140E2 · T140E3 · XM35 |
| 106 mm | M40A1C |
| 120 mm | M58 · M256 · T53 |
| 152 mm | M81 · M162 · XM150E5 |
| 155 mm | M185 · T7 |
| 165 mm | M135 |
| Foreign: | |
| 20 mm | Rh202 (Germany) |
| 57 mm | 6pdr OQF Mk.III (Britain) · ZIS-2 (USSR) |
| 105 mm | Sharir (Israel) |
| 120 mm | IMI MG251 (Israel) |
