The FN 509 MRD-LE (Miniature Red Dot — Law Enforcement) is a variant of the 509 full-size optimized for agency procurement, featuring an optics-ready slide with the MRD mounting system, night sights, and a rail. Marketed directly to law enforcement agencies as a turnkey optic-ready service pistol solution requiring no aftermarket machining or plate installation. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 17 Year introduced: 2019, Belgium Weight: 25.5 oz Overall length: 7.4" Status: Active Intended use: law_enforcement, service