The British Machine Gun is a term used to refer to two different types of weapons used by the British military during World War II. The first is the STEN, which was a submachine gun that was developed in 1941 and was used extensively by the British Army and Royal Air Force. The second is the BREN, which was a light machine gun that was developed in 1935 and was used by the British Army and Royal Navy. Both weapons were reliable and effective, and were used extensively throughout the war.