The M1911 is a single-action, semi-automatic, magazine-fed, recoil-operated pistol chambered for the .45 ACP cartridge. It served as the standard-issue sidearm for the United States Armed Forces from 1911 to 1986. It was first used in later stages of the Philippine-American War, and was widely used in World War I, World War II, the Korean War, and the Vietnam War. The pistol's 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 U.S. procured around 2.7 million M1911 and M1911A1 pistols in military contracts during its service life. The M1911 was replaced by the 9mm Beretta M9 pistol as the standard U.S. sidearm in October 1986, but due to its popularity among users, it has not been completely phased out. Modernized derivative variants of the M1911 are still in use by some units of 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 relatively slim width and the power of the .45 ACP cartridge.

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  1. T

    Looking to buy first 1911

    Not sure if I’m being too picky but I am looking for advice and recommendations and my experience with 1911’s is limited. My preferences are: 4-5 inch barrel Full grip Ambi (im a lefty) 45acp USA made Steel frame Under 1200 Rail if possible. I’ve been running around handling a few at some gun...
  2. Reno

    2011 magazines? Are the like 1911 mags? Universal fit?

    Do all 2011 9mm mags work in all 2011s? Ive got a converted 22tcm rifle that I have been looking to add magazines to. It takes the Armscor 2011 22tcm/9mm magazines. I had an aha moment where I thought, why wouldn’t it take a 2011 magazine! Anyways, looking to see if 2011 mags are pretty...
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