The FN 509 is FN's modernized striker-fired service pistol, developed directly from the MHS (Modular Handgun System) submission that competed against the SIG P320. While SIG won the MHS contract, FN commercialized the resulting pistol as the 509 family. Features a serialized fire control unit and optics-ready slide in all variants. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 17 Year introduced: 2017, Belgium Weight: 25.2 oz Overall length: 7.4" Status: Active Military use: Yes Intended use: service, military, law_enforcement, competition