Extend your internal Ruger SR22 barrel threads to 1/2-28 RH for mounting standard .22 accessories such as flash hiders, muzzle brakes, supressors, or cleaning adapters.
This high quality adapter features a durable black oxide steel construction and comes with a thread protector. This thread adapter easily replaces the factory barrel nut on the end of your barrel.
Inner Threads - 3/8-24 RH
Outer Threads - 1/2-28 RH
Material - Black Oxide Steel