SilencerCo AC2486 Threaded Barrel 4.50" 9mm Luger, Black Nitride Stainless Steel, Fits Sig P320 CompactP320 Compact, P320 RX Compact, P320 FDE Compact, P320 LIMA Compact, P320 Nitron Compact. All pistol suppressors require a threaded pistol barrel. SilencerCo noticed a market need for high quality pistol barrels and we stepped in to offer them. Holding to the same commitment to quality as all of our products, the threaded barrels are tough enough to hold up under the harshest conditions. Made of 416R stainless steel and finished in black nitride. For