The FN Five-seveN is a polymer-frame pistol chambered in the proprietary 5.7x28mm cartridge. The high-velocity small-diameter round was designed to defeat soft body armor. Adopted by multiple law enforcement and military agencies worldwide. Type: Semi-Auto Pistol Action: SA Caliber: 5.7x28mm Capacity: 20 Year introduced: 1998, Belgium Weight: 21.2 oz Overall length: 8.2" Status: Active Intended use: Law Enforcement, Military, Collector