Re: My AR muzzle brake
They're intended for .22 caliber centerfires with 1/2x28 threaded muzzles. I, along with several others have ran them on everything from .22lr, to 22-250. Everyone seems to like'em quite a bit. They work really well on M-16's and such, makes a HUGE racket, but near nil recoil and controllability goes through the roof!
Ken