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Complimenting the FN 509® Series is the all-new FN 509® MRD fullsize pistol equipped with the company’s patented Low- Profile Optics-Mounting System to users who want a full-sized duty-style pistol for personal or home defense. The pistol is chambered in 9mm and features a 4.5-inch cold hammer-forged barrel cut from the company’s proprietary machine gun-grade stainless steel. The barrel features the FN 509-signature recessed target crown to protect rifling maintaining accuracy and performance throughout the lifespan of the pistol. The full-sized slide and frame offer a secure grip and reduced recoil thanks to added weight and length of the slide. The FN 509® series of pistols includes Compact Midsize Standard and now Full-sized models. – Caliber: 9mm – Operation: Double-action striker-fired – Mag Capacity: 17 Rd. – Weight: 27 oz. – Barrel Length: 4.5 – Overall Length: 7.9 – Twist Rate: 1:10 RH – Height: 5.56 – Width: 1.35 – Trigger Pull: 4.5 lb.-6.0 lb. – Sight Radius: 6.3 – Primary Features – FN Low Profile Optics Mounting System with plate adapters for direct mounting of most major pistol red dot optics – All-black co-witness iron sights – SLIDE – Fullsize slide with longer sight radius – Aggressive slide serrations for positive manipulation – External extractor loaded chamber visual indicator – BARREL – Cold hammer-forged stainless steel – Recessed target crown – Polished chamber and feed ramp – FRAME – Enhanced grip texture which enables faster follow-up shots in all conditions – Interchangeable backstraps – MIL-STD-1913 accessory mounting rail – OPERATING CONTROLS – Fully ambidextrous slide stop lever and magazine release – MAGAZINE – High visibility low-friction follower; polymer base with black finish – SHIPS WITH – Three interchangeable backstraps – Two 17-round magazines or Two 10-round magazines – Four MRD mounting plates – Owner’s manual – Locking device – FN logo case