The term 'English Gun' refers to two different types of firearms. The first is the STEN gun, a British submachine gun developed during World War II. It was designed to be cheap and easy to manufacture, and was used by the British Army and other Allied forces. The second is the BREN gun, a light machine gun also developed during World War II. It was used by the British Army and other Commonwealth forces, and was considered to be one of the most reliable machine guns of the war.