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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.
Some authorities, such as Julian Hatcher, felt the Blish lock as employed in the submachine gun did not accomplish much in terms of actual breech locking. In fact, the submachine gun was successfully redesigned as a simple blowback weapon (the M1/M1A1). Any real advantages to the system were far outweighed by the additional cost of manufacture ...
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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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 ...
The overall weapon was based on the Thompson Submachine Gun, which Hyde drew inspiration from in many of his weapon designs. An original .30 Carbine based on the M1921/27 variants worked well. However, due to the rising production during World War II , the initial design was too expensive for mass production, and its weight defied the concept ...
Thompson studied several designs and was impressed with a delayed-blowback breech system designed by John Blish, a commander in the United States Navy. With Blish as a partner, Thompson obtained the necessary venture capital to form the Auto-Ordnance Company, and began working on the design of what eventually became the Thompson submachine gun. [4]
The M1911 design is a popular example of a handgun with a grip safety, [2] while the Uzi submachine gun and the HS2000 (marketed in the US as the Springfield Armory XD) and its descendants are other notable examples of this type of safety. Dan Wesson 1911-style Patriot pistol with a grip safety lever protruding at the back of the grip