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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]
Commissions to test possible new service pistols were active from 1904 till 1911. 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 ...
It was the first aluminum-framed large frame pistol in major production and the first Colt pistol to be originally chambered in 9 mm Parabellum. The first year's production included .45 ACP and .38 Super chamberings. [2] In 1970, Colt introduced the all-steel "Colt Combat Commander", with an optional model in satin nickel.
Colt had been working with Browning on a .41 caliber cartridge in 1904, and in 1905, when the Cavalry asked for a .45-caliber equivalent, Colt modified the pistol design to fire an enlarged version of the prototype .41 round. The result from Colt was the Model 1905 and the new .45 ACP cartridge.
Weapon type: Pistol Caliber:.45 ACP One of the most iconic and popular handguns ever made is the 1911. Though the original M1911 is associated with Colt, many other manufacturers, including Ithaca ...
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 semi-automatic pistol, chambered for .45 caliber ammunition, was the standard-issue sidearm for the U.S. military from 1911 to 1986. 12. Smith & Wesson M1917
While the .45 ACP uses .451 inches in diameter for jacketed bullets, and .452 for lead bullets, the .45 Colt still uses .452 inch diameter jacketed bullets and .454 diameter lead bullets, often adding to the confusion between the two cartridges with similar names as the .45 ACP and Model 1911 pistols will often be called ".45 Colt" in common ...