The FN 509 MRD full size pistol equipped with the patented Low Profile Optics Mounting System for users who want a full-sized duty-style pistol for personal or home defense. The pistol is chambered in 9mm and features a 4.50″ cold hammer-forged barrel featuring the FN 509 signature recessed target crown to protect rifling maintain accuracy and performance throughout the lifespan of the pistol. The slide and frame offer a secure grip and reduced recoil. Includes FN logo soft case two 17rd magazines three interchangeable backstraps four MRD mounting plates owners manual and gun lock.