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 oxide steel construction. This thread adapter easily replaces the factory barrel nut on the end of your barrel.
Does not include thread protector.
Inner Threads - M9 x .75 RH
Outer Threads - 1/2-28 RH
Material - Black Oxide Steel
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