Your EDC just got better with the all-new FN 509 Midsize MRD. This evolution of the FN 509 Midsize, now featuring the FN Low Profile Optics Mounting System, gives you the option of direct mounting more than 10 different miniature red dot optics to your concealed carry pistol. The FN 509 Midsize MRD features a four-inch barrel and slide with optics mounting package, a midsized frame, standard 15-round capacity and is compatible with larger capacity FN 509 magazines with use of a sleeve. The improved controls aid in manipulation, the new improved texturing on the two included backstraps provides better recoil management, and a new flatter faced trigger allows for more controllable trigger press and cleaner break. Features: FN Low Profile Optics Mounting System with plate adapters for direct mounting of more than 10 optics Aggressive FN 509 slide serrations for improved manipulation 4-inch Cold hammer-forged barrel with Recessed target crown & Polished chamber and feed ramp Shortened grip for easier concealment & enhanced grip texture which enables faster follow-up shots in all conditions All-black co-witness iron sights External extractor; loaded chamber indicator Interchangeable backstraps MIL-STD-1913 accessory mounting rail Improved flatter face trigger Fully ambidextrous slide stop lever and magazine release FN Soft Case Included Compatible with FN 509 17-round and 24-round magazines with appropriate magazine sleeves. Additional Specs: Action: Double Action (DA) Finish: Black Sights: All-Black Co-witness Iron Sights Frame Size: Midsize Compatible Optics: Trijicon RMR, Leupold DeltaPoint Pro, Vortex Razor, Viper, Venom, Burris FastFire II, III, Docter Optic, CMore STS II, And More Magazine: (2) 15 Rounds Whether its Fur and Feathers, Self-Defense or the Range, Palmetto State Armory has the Firearms, Accessories, and Ammunition you need at unbelievable prices!