Walther P-22 thread adapters change your factory threaded barrel to 1/2x28 TPI. Made from high grade stainless stee. Comes with diamond knurled thread protector. Uses a standard 1/2' wrench to tighten.

Sig Sauer Mosquito thread adapter changes your factory threaded barrel to 1/2x28 TPI. Made from high grade stainless steel. Comes with diamond knurled thread protector. Uses a standard 1/2" wrench to tighten.