Step into the field with the FN FN 509 Tactical 9mm Semiautomatic Gray Polymer Frame Pistol. The 4.5-inch barrel is threaded with a 1/2x28 pattern, and the polymer frame has an applied gray finish. FN FN 509 Tactical 9mm Semiautomatic Gray Polymer Frame Pistol - Handgun Semiauto Center Fire at Academy Sports