The Sterling Mk4 is the standard production designation for the primary military Sterling SMG variant, equivalent to the L2A3 designation used by the British Army. The Mk4 features the folding buttstock, side-mounted magazine, and perforated barrel jacket characteristic of all Sterling variants. Type: Submachine Gun Action: Semi/Full-Auto Caliber: 9mm Capacity: 34 Year introduced: 1953, UK Weight: 96 oz Overall length: 19" Status: Discontinued Military use: Yes Intended use: military, law_enforcement, collector