45, M1911 for the original model of 1911 or Automatic Pistol, Caliber. The pistol's formal designation as of 1940 was Automatic Pistol, Caliber.
It was widely used in World War I, World War II, the Korean War, and the Vietnam War. It served as the standard-issue sidearm for the United States Armed Forces from 1911 to 1986. The M1911, also known as the Colt Government or 'Government', is a single-action, semi-automatic, magazine-fed, recoil-operatedpistol chambered for the. Cartridge.45 ACPActionShort recoil operationMuzzle velocity830 ft/s (253 m/s)Feed system7 round standard detachable box magazine
