I am assuming based on the placement of this thread that you are talking about for an AR. This is purely my opinion and worth exactly what you paid for it. I HATE muzzle brakes. They are very loud and to me the sound concussion is much worse than any recoil they reduce. If you are concerned about reducing recoil you can use a heavier buffer, extra power buffer spring and/or a heavier bolt carrier. All these things will accomplish the same without making it a gun no one can stand to be on the range with when you fire it.