- Nation
- USA
- Tier
- 3
- Class
- Tank Destroyer
- Premium
- No
- Gift
- No
- Wheeled
- No
- Credits
- 30.000
- Gold
- 0
- Views
- 5
Development of a 3 inch self-propelled gun on the M3A3 Stuart chassis started in September 1942. Trials on the Aberdeen Proving Ground in November demonstrated that the gun was too heavy for the light tank chassis. Never entered mass production.
Default configuration

Radio
SCR 510
Signal range (m) | 325 |

Engine
Continental W-670
Power (hp) | 262 |
Fire chance | 0.20 |

Gun
3-inch AT Gun M7
Reload (s) | 3.77 |
Fire rate | 15.910 |
Aim time (s) | 1.71 |
Dispersion | 0.430 |
Traverse (°/s) | 40 |
Ammo max | 75 |
Elev (°) | 30 |
Depress (°) | 10 |

Chassis
T56 GMC
Load limit (kg) | 0 |
Traverse (°/s) | 28 |
All modules
Radio (3)

SCR 510
• 1.980 cr DEFAULT Signal range (m) | 325 |
Next modules: SCR 610

SCR 610
• 24.600 cr Signal range (m) | 420 |
Next modules: SCR 619

SCR 619
• 54.000 cr Signal range (m) | 750 |
Engine (3)

Continental W-670
• 8.200 cr DEFAULT Power (hp) | 262 |
Fire chance | 0.20 |
Next modules: Continental W-670 Series 12

Continental W-670 Series 12
• 8.300 cr Power (hp) | 288 |
Fire chance | 0.20 |
Next modules: Wright Continental R-975C1

Wright Continental R-975C1
• 11.000 cr Power (hp) | 400 |
Fire chance | 0.20 |
Gun (2)

3-inch AT Gun M7
• 33.500 cr DEFAULT Reload (s) | 3.77 |
Fire rate | 15.910 |
Aim time (s) | 1.71 |
Dispersion | 0.430 |
Traverse (°/s) | 40 |
Ammo max | 75 |
Elev (°) | 30 |
Depress (°) | 10 |
Next modules: 57 mm Gun M1

57 mm Gun M1
• 33.000 cr Reload (s) | 2.51 |
Fire rate | 23.860 |
Aim time (s) | 1.71 |
Dispersion | 0.390 |
Traverse (°/s) | 44 |
Ammo max | 100 |
Elev (°) | 17 |
Depress (°) | 5 |
Chassis (2)

T56 GMC
• 740 cr DEFAULT Load limit (kg) | 0 |
Traverse (°/s) | 28 |
Next modules: T57 GMC

T57 GMC
• 1.480 cr Load limit (kg) | 0 |
Traverse (°/s) | 30 |