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The pistol's formal U.S. military designation as of 1940 was Automatic Pistol, Caliber .45, M1911 for the original model adopted in March 1911, and Automatic Pistol, Caliber .45, M1911A1 for the improved M1911A1 model which entered service in 1926. The designation changed to Pistol, Caliber .45, Automatic, M1911A1 in the Vietnam War era. [10]
The Compact model features a skeletonized hammer and beavertail grip safety, while the Tactical model adds a target-grade hammer and trigger, as well as an ambidextrous safety and enhanced contrast iron sights. Rock Island Armory 1911 EFS Stainless Steel in 45 ACP. Variants of Rock Island Armory 1911 pistols include: [2] [8] [5]
The .45 ACP (not to be confused with .45 Colt) cartridge is a very popular caliber due to its low velocity and relatively high stopping power. This caliber is associated most with the Colt M1911, logically, as ACP literally means 'Automatic Colt Pistol'. However, there are many more guns and variations on the M1911 that are chambered in .45 ACP.
The AMT Hardballer is a series of pistols that are part of the 1911 platform (based on the .45 ACP M1911) made by Arcadia Machine & Tool (AMT) from 1977 to 2002. [1] The Hardballer was the first entirely stainless steel 1911 pattern pistol. [2] Other features included adjustable rear sights and a lengthened grip safety. [3]
SIG Sauer of Newington, New Hampshire, manufactures a full line of 1911 styled handguns.The earliest models were very faithful to the John M. Browning designed Colt M1911 Pistol which became the United States standard sidearm and served in that capacity for some seven decades before being replaced by the Beretta M9 handgun.
The Colt Officer's Model or Colt Officer's ACP is a single-action, semi-automatic, magazine-fed, and recoil-operated handgun based on the John M. Browning designed M1911.It was introduced in 1985 as a response from Colt to numerous aftermarket companies making smaller versions of the M1911 pistol.
As an M1911 style pistol, it is usually chambered in .45 ACP. It also has been produced in other calibers, including .40 S&W, 10mm Auto, 9mm Luger, and .38 Super. The individual gun's caliber is stamped on top of the barrel and is visible with the slide in battery (fully forward). The Custom is a full-sized model 1911, with a five-inch barrel.
In 1911, a commission recommended adoption of the semi-automatic .38 ACP caliber Colt Military Model 1902 pistol, after field trials with 25 such pistols, all purchased from Colt's London Agency. However, as the US had just adopted the Colt .45ACP M1911 pistol it was decided to conduct further tests.