The term British Weapon can refer to three different weapons: the STEN, the BREN, and the STENGUN. The STEN is a family of British submachine guns that were used during World War II. The BREN is a light machine gun that was used by the British Army from the 1930s until the 1990s. The STENGUN is a British-made semi-automatic rifle that was used in the early 20th century. All three of these weapons have been used by the British military for many years.