The HK MP7A1 is a personal defense weapon chambered in the proprietary 4.6x30mm cartridge, designed to be more compact than a submachine gun while providing better barrier penetration than pistol-caliber weapons. Adopted by German special operations, UK SAS, and numerous other elite units as a personal defense weapon for vehicle crews and headquarters personnel. Type: Submachine Gun Action: Semi/Full-Auto Caliber: 4.6x30mm Capacity: 40 Year introduced: 2001, Germany Weight: 67.04 oz Overall length: 16.7" Status: Active Military use: Yes Intended use: military, special_operations, law_enforcement