The Sten Gun is a British submachine gun developed during World War II. It was designed for mass production and ease of use, featuring a simple blowback mechanism. The weapon is known for its distinctive appearance, with a tubular body and a side-mounted magazine. It fires the 9x19mm Parabellum cartridge, making it effective for close-quarters combat. The Sten Gun was widely used by British and Commonwealth forces, as well as resistance groups. Its low cost and rapid production allowed for quick distribution during the war. Despite its reliability, the Sten Gun had a reputation for being somewhat inaccurate and prone to jamming under certain conditions.