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Dead Air Armament Thread Adapter 1/2x28 RH Fits FN 5.7, Black - DA422

Dead Air Armament Hub 1/2X28

Dead Air Armament Thread Protector 1/2x28 RH Rimfire, Black - DA424

Dead Air Armament Thread Spacer 1/2x28 TPI

Dead Air Armament Thread Adapter 1/2x28 RH Fits Walther P22, Black - DA419