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Gun, Air Defence Artillery, Self-Propelled, 40-mm, M247
General characteristics
3 peopleCrew
49.4 tWeight
4 forward
1 back
Gear box
2 х 40 mm M266 automatic cannonWeapon 1
560 roundsAmmunition
280 roundsBelt capacity
300 shots/minFire rate
-5° / 85°Vertical guidance
180 000 Rp icon.pngResearch
490 000 Sl icon.pngPurchase
Sl icon.png4 600 / 6 932/1 800 / 2 712/10 000 / 15 069Repair
140 000 Sl icon.pngCrew training
490 000 Sl icon.pngExperts
2 000 Ge icon.pngAces
x 2.14 Rp icon.pngReward for battle


The Gun, Air Defence Artillery, Self-Propelled, 40-mm, M247 is a Rank VI American self-propelled anti-aircraft gun with a battle rating of 8.0 (AB/RB/SB). It was introduced in Update 1.81 "The Valkyries".

General info

Survivability and armour

Armour type:

  • Cast homogeneous armour (Hull)
  • Rolled homogeneous armour (Rear (low), Roof, Turret)
Armour Front (Slope angle) Sides Rear Roof
Hull 85-200 mm (59-74°) Front glacis
63-200 mm (13-60°) Lower glacis
76 mm (8-43°) Front
51 mm (0-43°) Rear
35 mm (26-32°) Top
25 mm (61-62°) Bottom
57 mm
Turret 25.4 mm (15-76°) Turret front (Upper)
12.7 mm (40-69°) Turret front (Lower)
25.4 mm (0-87°) Gun mantlet
12.7-25.4 mm (0-19°) Upper
12.7 mm (40-69°) Lower
12.7 mm (18°) 12.7 mm


  • Suspension wheels and tracks are 20 mm thick.
  • Belly armour is 38 mm in the front and 25 mm in the rear.


Write about the mobility of the ground vehicle. Estimate the specific power and manoeuvrability as well as the maximum speed forward and backward.


Main article: Bofors L/70 (40 mm)
40 mm M266 Automatic Cannon (x2)
Capacity (Belt capacity each) Fire rate
560 (280) 300 -5°/+85° ±180°
Turret rotation speed (°/s)
Mode Stock Upgraded Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
Arcade 52.8  ?  ?  ?  ?
Realistic 35.7  ?  ?  ?  ?
Reloading rate (seconds)
Stock Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
6.5  ?  ?  ?


Penetration statistics
Ammunition Type of
Penetration in mm @ 90°
10m 100m 500m 1000m 1500m 2000m
M811 HEFI-T* 5 5 5 5 5 5
M822 HEFI-T* 5 5 5 5 5 5
40 mm AP-T AP-T 93 90 77 62 51 41
Shell details
Ammunition Type of
in m/s
Mass in kg
Fuse delay

in m:

Fuse sensitivity

in mm:

Explosive Mass in g
(TNT equivalent):
Normalization At 30°
from horizontal:
0% 50% 100%
M811 HEFI-T* 1100 0.87 0.2 0.1 255 +0° 79° 80° 81°
M822 HEFI-T* 1100 0.87 0.2 0.1 185 +0° 79° 80° 81°
40 mm AP-T AP-T 1030 0.88 N/A N/A N/A -1° 48° 69° 79°

Belt types

Belts Shell composition Combat usage
Default HEFI-T* / AP-T These work fine, a hit on an aircraft means instant disassembly for it and still is able to hurt ground vehicles, especially if it is side into the side of a enemy tank. These seem like a good I don't know what i will run into belt.
40 mm AP-T AP-T / AP-T / AP-T / HEFI-T* Very powerful ammunition against ground targets with significantly more penetration than other 35-40 mm AP-T projectiles. Will easily destroy any target with side shots even outside point blank range, and can destroy lighter targets and weak spots from the front even against MBTs.
M811 HEFI-T* / HEFI-T* / HEFI-T* / AP-T "Poor man's anti-air ammunition." Unlike the M822 shells these require direct hits to do damage, but if you experience problems with M822 detonating too early this belt may be your best choice.
M822 HEFI-T* / HEFI-T* / AP-T Proximity-fused shells that absolutely obliterate anything flying, when they work. Somewhat unreliable in if they detonate within range of the target, but when they do the target will be quickly torn apart. The only ammunition for self-propelled anti-aircraft guns that lets you kill planes and helicopters with near misses. Should be your go-to anti-air ammunition, if it works reliably for you.

Usage in battles

Pros and cons


  • Twin 40mm M266 cannon (L/70 40mm Bofors) have a better rate of fire compared to the M42 Duster.
  • The M822 ammunition is proximity fused, and will detonate if the projectile passes close enough to the target.
  • The 40mm's pose a serious threat to lightly-armored vehicles.
  • Uses the M48 Patton's hull (armor included) = one of the best-protected SPAA in the game.
  • Benefits in RB from aim assist thanks to the radar.


  • As with all high-rank SPAA, very thin turret armor; a shell strike could instantly end the vehicle.
    • Turret is also vulnerable to strafing aircraft + rockets.
  • Armor advantages are nullified due to the inclusion of the Hull Break mechanic


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 "/ History" (example: https://wiki.warthunder.com/(Vehicle-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref>, as well as adding them at the end of the article.


Skins and camouflages for the M247 Sergeant York from live.warthunder.com.

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;
  • links to approximate analogues of other nations and research trees.

External links

USA anti-aircraft vehicles
Based on M3  Multiple Gun Motor Carriage M13 · Multiple Gun Motor Carriage M16 · Combination Gun Motor Carriage M15A1
Based on M24  Twin Gun Motor Carriage M19
Post-war  Twin 40 mm Self-Propelled Gun M42 Duster · Gun Air Defence Artillery Self-Propelled 20-mm M163 · Gun, Air Defence Artillery, Self-Propelled, 40-mm, M247