Thompson Sub-machine gun 'Tommy Gun', invented in 1919. The Thompson was favored by soldiers, criminals, police and civilians alike for its ergonomics, compactness, large .45 ACP cartridge, reliability, and high volume of automatic fire.
Thompson_in_violin_case - WAR HISTORY ONLINE
Thompson submachine gun models - what every Call of Cthulhu character needs for Christmas.
Thompson submachine gun - Wikipedia, the free encyclopedia