The FN Five-seveN MkI is the original production variant of FN's radical high-capacity pistol chambered for the proprietary 5.7x28mm cartridge, offering 20-round capacity, a polymer frame, and the ability to penetrate soft body armor with military SS190 ammunition. Type: Semi-Automatic Pistol Action: Striker-Fired Caliber: 5.7x28mm Capacity: 20 Year introduced: 1998, Belgium Weight: 20.8 oz Overall length: 8.2" Status: Discontinued Intended use: law_enforcement, military, self_defense