The term WWII British Weapon can be summarized as the STEN, a four-letter word. The STEN was a family of British submachine guns used extensively by British and Commonwealth forces throughout World War II and the Korean War. It was notable for its simple design and low production cost, which made it an ideal weapon for mass production. The STEN was reliable, easy to use, and had a high rate of fire, making it a popular choice for soldiers in the field.