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The M1A1 Thompson submachine gun on display at the Virginia War Museum. The M1A1, standardized in October 1942 as the United States Submachine Gun, Cal. .45, M1A1, could be produced in half the time of the M1928A1, and at a much lower cost. The main difference between the M1 and M1A1 was the bolt.
Auto-Ordnance Corporation was created by John T. Thompson in August 1916 with the backing of investor Thomas Ryan. In 1915 Thompson had found the Blish Lock patent of Commander John Blish, which was the operating principle of the first prototypes of the Thompson submachine gun and the Thompson Autorifle. In exchange for shares of the newly ...
Any real advantages to the system were far outweighed by the additional cost of manufacture associated with the device. Also, in the Thompson submachine gun the H-shaped bronze lock connects the bolt actuator to the bolt body; incorrect installation of the Blish lock can render a Thompson inoperable upon firing.
The Thompson Light Rifle was an attempt by the Auto-Ordnance Company to manufacture a light rifle for the United States Armed Forces. The overall weapon was based on their well proven .45 ACP submachine gun, although the original .30 Carbine caliber rifle was based on the M1921/27 variants. It worked well but due to the war effort was found ...
In firearms, a blowback system is generally defined as an operating system in which energy to operate the firearm's various mechanisms, and automate the loading of another cartridge, is derived from the inertia of the spent cartridge case being pushed out the rear of the chamber by rapidly expanding gases produced by a burning propellant, typically gunpowder. [3]
In the later 1920s, there was some limited progress: around 1926, Cutts compensator became an option in the Thompson SMG (R. M. Cutts' earliest patent is from 1925 [7]), in 1927 Škoda patented [8] a family of muzzle brake designs, one of which was used on 8 cm kanon vz. 28, and in 1928, Schneider et Cie (which was allied with Škoda at the ...
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Thompson Autorifle Model 1923 (top) and SMG Model 1921. The Thompson Autorifle, (also referred to as the Thomoson Model 1923 Autoloading Rifle; and the .30-06 Model 1923 Semi-Automatic Rifle, among others, etc.) was a semi-automatic rifle that used a Blish Lock to delay the action of the weapon.