The M1911 is a single-action, semi-automatic, magazine-fed, recoil-operated handgun chambered for the .45 ACP cartridge, which served as the standard-issue sidearm for the United States armed forces from 1911 to 1985. It was widely used in World War I, World War II, the Korean War, and the Vietnam War. The M1911 is still carried by some U.S. forces. Its formal designation as of 1940 was Automatic Pistol, Caliber .45, M1911 for the original Model of 1911 or Automatic Pistol, Caliber .45, M1911A1 for the M1911A1, adopted in 1924. The designation changed to Pistol, Caliber .45, Automatic, M1911A1 in the Vietnam era. In total, the United States procured around 2.7 million M1911 and M1911A1 pistols in military contracts during its service life. The M1911 was replaced by the M9 pistol as the standard U.S. sidearm in the early 1990s, but due to its popularity among users, it has not been completely phased out. Modern M1911 variants are still in use by some units within the U.S. Army Special Forces, the U.S. Navy and U.S. Marine Corps.
Designed by John Browning, the M1911 is the best-known of his designs to use the short recoil principle in its basic design. The pistol was widely copied, and this operating system rose to become the preeminent type of the 20th century and of nearly all modern centerfire pistols. It is popular with civilian shooters in competitive events such as USPSA, IDPA, International Practical Shooting Confederation, and Bullseye shooting. Compact variants are popular civilian concealed carry weapons, because of the design's inherent slim width and the power of the .45 ACP cartridge.
-Colt Government Mk. IV Series 70 (1970â€“1983): Introduced the accurized Collet Barrel Bushing (1970â€“1988).
-Colt Government Mk. IV Series 80 (1983â€“1988): Introduced an internal firing pin safety.
-Colt M1991A1 (1991â€“2001 ORM; 2001â€“present NRM): A hybrid of the M1911A1 military model redesigned to use the slide of the Mk. IV Model 80. The 1991â€“2001 model used the old Colt rollmark engraved on the slide. The 2001 model introduced a new rollmark engraving
Type: Semi-automatic pistol
Place of origin: United States
In service: 1911â€“present
Used by: 28 nations
Wars: As standard U.S. service pistol
World War I
World War II
In non-standard use:
War in Afghanistan
Designer: John Browning
Designed: 1911 and 1924 (A1)
Number built: Over 2.7 million
Weight: 2.44 lb (1,105 g) empty, w/magazine
Length: 8.25 in (210 mm)
-Government model: 5.03 in (127 mm)
-Commander model: 4.25 in (108 mm)
-Officer's ACP model: 3.5 in (89 mm)
Cartridge: .45 ACP (11.43 mm)
Action: Short recoil operation
Muzzle velocity: 825 ft/s (251 m/s)
Feed system: 7-round standard detachable box magazine[