Meh, one of my first AR's was a Stag Model 6, the upper has all but lost it's anodizing on the contact points of BCG and there is other wear in the area, almost as if it is "tight" and excess buildup of the anodizing material. I'm not blown away by it and it functions just the same as my beater P-Tach Palmetto State Armory Cyber Monday special.