These compensators are specifically designed for the Sig P320 and Springer Precision's Bar-Sto aftermarket barrel with compensator threading, in 1/2 x 28. Will NOT work with the SIG factory threaded barrels. Designed to also work with most factory ammunition. Made from USA sourced aluminum and matte black anodized for a light weight, long lasting compensator to tame muzzle flip and soften recoil. .86 oz
**THIS COMP IS NOT FOR USE WITH SIG FACTORY THREADED P320 BARRELS