| Year | December 1942 (M3) December 1944 (M3A1) |
| Weapon Type | [@type] |
| Origin & Designer | [@designer] |
| Numbers Produced | 680.000 (M |
| Crew | [@crew] |
| Calibre | .45 ACP (11.43x23) |
| Elevation | [@elevation] |
| Traverse | [@gun_traverse] |
| Cartridge Weight | [@cartridge_weight] |
| Round Weight | 230gr (15g) |
| Barrel Length | 205mm |
| Overall Length | 750mm |
| Grenade Types | [@grenade_types] |
| Mount | [@mount] |
| Combat Weight | 4.52 kg (M3) 4.43 kg (M3A1) |
| Operation | BlowBack / Fully Automatic |
| Cooling System | [@cooling] |
| Sights | Front Blade and Fixed Rear Peep |
| Feed | 30 Round Box Magazine |
| Practical Rate of Fire | 120 r.p.m. |
| Maximum Rate of Fire | 450 r.p.m. |
| Blank Cartridge | [@blank_cartridge] |
| Muzzle Velocity | 280 m/s |
| Fuel Capacity | [@fuel_capacity] |
| Minimum Range | [@minimum_range] |
| Effective Range | 50m |
| Maximum Range | 150m |
| Armour Penetration | [@armour_penetration] |
| Bayonet | [@bayonet] |
| Traction | [@traction] |
| Variants | [@variants] |
| Notes | After the British introduced the Sten Sub-Machine gun in 1941, the US Ordinance board decided to adopt a similar design by using a pressed metal construction to make a cheap and simple weapon, the new gun was called the M3 and was manufactured by General Motors, they were first introduced in late 1942, with a the modified M3A1 arriving late 1944. After WW2 the M3 was mainly issued to Tank Crews. |
