WMD Guns 9mm Luger Threaded AR Barrel 5.5 inch 1-10 Twist 1/2X36 Nitride Black 9mm5.5 1-10. They have united metallurgists chemists gunsmiths and plating engineers to establish one of the top firearm coating companies in the industry. WMD Guns products are the outcome of that collective expertise. They sell whole firearms chassis and individual components that they produce and plate in-house as well as offerings from other top manufacturers. Many of their selections are made to order. Specifications for WMD Guns 9mm Luger Threaded AR Barrel: Manufacturer: WMD Guns Color: Black Finish: Nitride Black Caliber: 9mm Luger Barrel Twist Rate: 1-10 Case Finish: Nitride Handle Color: Black Blade Finish: Nitride Features of WMD Guns Barrel 9MM 10.5 Barrel Threaded 1/2X28 110 Twist Nitride Finish Black: 10.5 Length" Package Contents: WMD Guns Barrel 9MM 10.5 Barrel Threaded 1/2X28 110 Twist Nitride Finish Black WMD Guns 9mm5.5 1-10: 9mm Luger Threaded AR Barrel 5.5 inch 1-10 Twist 1/2X36 Nitride Black