STEN Submachine Gun
The STEN was a family of British submachine guns chambered in 9×19mm and used extensively by British and Commonwealth forces throughout World War II and the Korean War. They had a simple design and very low production cost, so they were also effective insurgency weapons for resistance groups.
Effective firing range: 100 m
Rate of fire: version dependent; ~500–600 round/min
Barrel length: 196 mm (7.7 in)