Brand new in box, never used. DLC coated diamond fluted match grade barrel. Ported at end of barrel and compensator for smooth fitting. Only requires 1 screw to take off. Not a threaded barrel, so legal in all states of the beautiful USofA. Has been confirmed by manufacturer and other experts will reduce muzzle rise by 40% straight out the box. Nothing as good on the market except for the new Canik TTI combat master ported barrel and Comp system.