Country of Origin : United States Role : Pistol In-Service Date : March 1911 Manufacturer : Colt Patent Firearms Co. Number Produced : 2,300,000+ Operation : Single Action Semi-Automatic Feed : 7 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 : 21.91 cm Barrel Length : 12.78 cm Empty Weight : 1.14 kg Combat Weight : 1.36 kg Muzzle Velocity : 253 meters per second Practical Rate of Fire : 21 rounds per minute Cyclic Rate of Fire : 21 rounds per minute Effective Range : 25 meters Scope Types : None Bayonets : None Grenades : None Other : None