The FN 509 LSG (Long Slide, Government) is a law enforcement and government procurement variant of the long-slide 509 family, featuring a 5-inch barrel, optics-ready slide, extended 24-round magazine, and a suppressor-height sight system. Developed under government procurement specifications for agencies requiring maximum capacity and long-slide accuracy in a single platform. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 24 Year introduced: 2022, Belgium Weight: 31.5 oz Overall length: 8.3" Status: Active Intended use: law_enforcement, military, service