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Caliber:.45 ACP. The SIG Sauer P250 is a semi-automatic pistol made by Sigarms (now known as Sig Sauer Inc. of Exeter, New Hampshire). Introduced in 2007 the SIG P250 can be chambered in .22 Long Rifle, .380 ACP, 9×19mm Parabellum, .357 SIG, .40 S&W, and .45 ACP. The P250 chambered in 9×19mm Parabellum was introduced to the North American market on November 7, 2007 followed by the .45 ACP compact model in February 2008 at the SHOT Show. The last of the models were introduced in late 2009.
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Caliber: .45 ACP. The Suomi KP/-31 (Suomi-konepistooli or 'Finland-submachine gun', literally: 'Finland Machine-pistol') was a submachine gun (SMG) of Finnish design used during World War II. It was a descendant of the M-22 prototype and the KP/-26 production model, which was revealed to the public in 1925. The Suomi-konepistooli KP/-31 is often abbreviated to Suomi KP.
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Caliber: .45 ACP. The Thompson submachine gun is an American submachine gun invented by John T. Thompson in 1918 which became infamous during the Prohibition era, being a signature weapon of various crime syndicates in the United States. It was a common sight in the media of the time, being used by both law enforcement officers and criminals. The Thompson submachine gun was also known informally as the 'Tommy Gun'.