This is the famous Freedom QA Brake. We offer it in two different varieties, which are 556 NATO and 762 NATO.
The 762 variant is for AR10 or bolt rifles in 762 NATo or 308 WIN and will work on other guns in calibers such as 243 WIN and 260REM.
The 556 variant is for AR15 rifles and bolt guns and any rifle with a 1/2-28 muzzle thread.
Muzzle brakes do many things at once, some of which are providing a sacrificial blast baffle to protect the silencer for longer life.
Choose which caliber you need from the drop down menu.