The SIGARM P220 Combat was designed to meet the rigorous military standards like a 240-hours salt spray test and 20,000-round accuracy test. Each pistol features the military's Flat Dark Earth finsih on its alloy frame and SIG's Nitron over a stainless slide. Internal parts and controls are coated or phosphated for extreme corrosion resistance and reduced friction, and the barrel is hard-chromed and finished in Nitron. The P220 Combat TB is built to the same tough military standards, and features the addition of a threaded barrel for suppressor attachment. The Combat and Combat TB are available with the 8-round or 10-round extended magazine.