These compensators are specifically designed for the Sig P320 and our Barsto aftermarket barrel with compensator threading, in 1/2 x 28.  For use with factory +p ammunition or 9mm major ammuntion.  Will NOT work with the SIG factory threaded barrels.  Made from USA sourced aluminum and anodized for a light weight, long lasting compensator to tame muzzle flip and soften recoil.  1.07 oz

**THIS COMP IS NOT FOR USE WITH SIG FACTORY THREADED p320 BARRELS