GlocksRock
Member
I want a RRA M4 upper, but nobody seems to have the chrome lined barrels in stock, so I was considering paying a bit more for the CMMG upper. How much better, if any better is the CMMG upper, I know that it has feed ramp cuts, and T markings, but I have no idea how the T markings benefit me, or what they are even for. Can someone shed some light on my situation? My complete lower receiver will be shipping out tommorrow, and I want to make a decision soon.