The Five-seveN is FN's polymer-frame pistol chambered in the proprietary 5.7x28mm cartridge. With a 20-round magazine, delayed blowback operation, and exceptional accuracy, it was developed alongside the P90 to replace pistols and SMGs in NATO service. The civilian variant fires commercially available SS197SR ammunition. Type: Pistol Action: Semi-Automatic Caliber: 5.7x28mm Capacity: 20 Year introduced: 1998, Belgium Weight: 20.8 oz Overall length: 8.2" Status: Active Military use: Yes Intended use: Duty, Military, Law Enforcement, Collecting