FN 509M MRD 9mm 4" 10+1 Pistol, Black - 66100588

FN 509 Midsize MRD is a striker-fired semi-auto pistol chambered in 9mm Luger with a 4-inch barrel and 10+1 capacity. Features an optics-ready slide with FN Low Profile Optics Mounting System for direct mounting of miniature red dot sights, co-witness iron sights, and interchangeable backstraps. Weighs 26.5 oz with a polymer frame and blackened stainless steel slide.