- Fits standard Sig Mosquito Threads
- Adapted threads are 1/2-28 with O-Ring engagement
- Thread protector included
This SILENCERCO Sig Mosquito Adapter with Thread Protector (AC4) comes with standard 1/2x28 threads for use with 22Sparrow or any other 1/2x28 threaded .22 LR suppressor. Enjoy the benefits of O-ring engagement, which keeps the muzzle threads clean and your suppressor from loosening while firing. The adapter comes with thread protector, which also has O-ring engagement.