The FN 509 MRD is a full-size, striker-fired pistol in 9mm designed for duty or personal defense applications. It features FN America’s patented Low Profile Optics Mounting System, allowing users to mount optics directly to the slide. The barrel measures 4.50″ and is cold hammer-forged with FN’s signature recessed target crown, which protects the rifling and sustains accuracy over the pistol’s service life. The slide and frame geometry delivers a secure grip while managing recoil effectively.
This package includes an FN logo soft case, two 17-round capacity magazines, three interchangeable backstraps, four MRD mounting plates, an owners manual, and a gun lock—everything you need for immediate deployment in a duty or home defense role.
