Gentlemen I would like to upgrade the bolt carrier group on my CMMG M4 LE upper, and I would like some input on what to get. I have been looking at BCM, DD, LMT, and Wilson Combat and cannot decide which to get. I know they are all good, and much better than what is in my CMMG, but is which is best and the best value? Help me make a choice! Wanna kill these ads? We can help!