FN 509 Tactical is a 9mm handgun revered for its smooth action and generous slide mount capabilities, among other convenient features. With its 4.5” threaded barrel made of cold hammer-forged stainless steel and featuring a recessed target crown and an O-ring detection thread cap, the FN 509 Tactical comes fully equipped with the FN Low Profile Optics Mounting System, suppressor-height night sights, a striker-fired autoloader, a loaded chamber indicator, and 2 interchangeable backstraps. Packaged with two 24 round magazines and one 17 round magazine