I put a Beretta muzzle brake on one of my garands years ago, just because. I think I got it from sarco? or maybe ? Anyway, it was meant for a BM-59. Will this be bad for the op-rod on my rifle. I shoot ball 30'06 only in it and not much at that (don't have much and hard to come by around these parts) my volume shooting is with my 308.The brake fits on the end of the rifle, held on by gas plug. It has lots of small holes, actually works nicely.