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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 Colt Model 1910 was a prototype .45 ACP caliber automatic pistol developed by John Browning as an improvement of the earlier Colt Model 1909, which was rejected by the United States Department of War due to the Cavalry's belief that the design was too complicated for use by enlisted men, and because it lacked a safety mechanism. The M1910 ...
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.
John Browning's 1911 .45 ACP has been used for many cartridges over the past century. In every instance the cartridge used a bullet with a diameter that was the same or smaller than the original .451". Both the Desert Eagle and the LAR Grizzly have been offered in cartridges of .50 caliber. Both are large cartridges requiring a large, heavy pistol.
Browning's most successful designs include the M1911 pistol, the water-cooled M1917, the air-cooled M1919, and heavy M2 machine guns, the M1918 Browning Automatic Rifle, and the Browning Auto-5 – the first semi-automatic shotgun. Some of these arms are still manufactured, often with only minor changes in detail and cosmetics to those ...
Browning Arms Company (originally John Moses and Matthew Sandefur Browning Company) is an American marketer of firearms and fishing gear. The company was founded in Ogden, Utah , in 1878 by brothers John Moses Browning (1855–1926) and Matthew Sandefur Browning (1859–1923).
The Pistol, Browning FN 9mm, HP No. 2 MK.1/1 Canadian Lightweight Pattern was a series of experimental aluminum/aluminum alloy framed Browning Hi-Power pistols by the Canadian Inglis Company that reduced the weight by as much as 25% from 8.5 to 25.5 oz (240 to 720 g). [36]
Models in use included the M1911A1 (Colt .45 Automatic), Smith & Wesson (Combat Masterpiece in .38 Special caliber), Smith and Wesson Model 1917 (.45 ACP and .45 Auto Rim) and various other small arms. By the 1970s it became obvious that the M1911A1 (Colt Government .45ACP) model was going to have to be replaced. [4]