18mm and Larger Conversion Adapters

Extend your Sig 1911 (.22LR) and  GSG 1911 (.22LR) barrel threads to 1/2-28 RH for mounting standard .22 accessories such as flash hiders, Muzzle Devices, supressors, or cleaning adapters. This high quality adapter features a durable black...

Convert your Sig Mosquito (.22) barrel thread to 1/2-28 RH for mounting standard .22 accessories such as flash hiders, Muzzle Devices, supressors, or cleaning adapters. This high quality adapter features a durable black oxide steel construction...

Extend your internal Walther P22 (standard 3.4" barrel model only), Walther PPK/S, M&P 22, Colt/Umarex 1911 A1, and Colt Gold Trophy .22 barrel threads to 1/2-28 RH for mounting standard .22 accessories such as flash hiders, Muzzle Devices,...