A machine pistol is a type of firearm that combines the compact size of a pistol with the automatic fire capability of a submachine gun. The STEN (4 letters) is a British-made machine pistol developed during World War II. It was a simple, inexpensive design made from stamped metal parts and was used by the British Army and other Allied forces. The BURPGUN (7 letters) is a Soviet-made machine pistol developed in the late 1940s. It was designed to be lightweight and easy to use, and was widely used by the Soviet military and other Warsaw Pact countries.