All AR's have a certain amount of cam pin gouge which is normal and the wear often stops after a certain point. But I have noticed that AA uppers seem to be a little more critical when it comes to Cam gouging but its a simple and easy fix by either using the Roller Cam Pin from POF-USA or the R.E.P.R. Cam Pin from LWRC.
While this gouging issue will settle down and most likely stop completely with time it is just another friction point for your new build to over come while cycling.
I run the Roller Cam Pin on all my Piston guns and the R.E.P.R. on any new DI gun, for the few dollars they cost it just added piece of mind.
We are all inclined to judge ourselves by our ideals; others, by their acts.
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