Not worth the money - SGM Tactical VEPR/AK-47 7.62/.308 Conical Rifle Muzzle Brake

It seems like a good comp but for the money it doesnt even have a flat spot for you to tighten it onto the barrel and if your try the screw driver method it doesnt fit because the ports on the side are too small. You could probably find an allen wrench that would do the trick but it would be hard getting enough leverage to tighten it enough. The designs seems good and it's not too expensive but based on some of the cheaper options you are better off getting one of those, plus they will probably be lighter, this comp is pretty heavy.