Country of Origin : United States Role : Sub-Machinegun In-Service Date : July 1942 Manufacturer : General Motors Corp. Number Produced : Unknown Operation : Blowback Full Automatic Feed : 30 round box magazine Cartridge Name : .45 Auto Colt Pistol (ACP) Cartridge Size : 11.43mm x 23mm Cartridge Total Weight : 19.1 grams Bullet Weight : 14.9 grams Weapon Length : 75.7 cm Barrel Length : 20.3 cm Empty Weight : 3.7 kg Combat Weight : 4.52 kg Muzzle Velocity : 280 meters per second Practical Rate of Fire : 120 rounds per minute Cyclic Rate of Fire : 450 rounds per minute Effective Range : 200 meters Scope Types : None Bayonets : None Grenades : None Other : None