The FN 509 Midsize MRD delivers exceptional performance in a compact platform chambered in 9mm Luger with a 3.8-inch barrel and optics-ready design featuring multiple footprint compatibility.FN 509 Midsize MRD Semi-Automatic Pistol9mm Luger caliber with 20-round magazine capacity3.8-inch barrel length 22.5-ounce weightBlack polymer frame and slide constructionFiber optic sights for rapid target acquisitionMultiple optic footprint compatibility (MRD)Includes 2 magazines (20-round and 16-round)Semi-automatic action with polymer gripIdeal for tactical applications concealed carry and competitive shooting this FN pistol combines reliability accuracy and modularity in a proven platform trusted by professionals worldwide.