The muzzle brake on my RPR came with a slight cant. It's not that bad, but when I look down the barrel and see it's not squared with my hand guard, it bugs me. Is there an easy way to adjust the brake without marring anything? I don't mind paying a gunsmith the adjust it, but after reading some reviews for local gunsmiths, I think they may mar it themselves. I'm sure I could get it adjusted, problem is I'm not so sure how to do it without jacking up the jam nut.