Well... I finally received the CMMG back earlier this week. I’m not real sure what CMMG did to my gun, something about either a new bolt carrier group or it’s revised. Also they “flex honed” the chamber or something. It looks like most of the bottom lug is missing. The sharp edge where the FMJ was hanging up before it left the magazine is still there. If the gun doesn’t run now I will trade it in to the LGS where I bought it (they have great customer service). I won’t deal with CMMG again. The final straw was that CMMG requested one of the magazines I was having problems with. So with the gun I included one of the brand new Glock magazines. They kept it! The LGS I bought the gun through was nice enough to give me a replacement magazine for no charge. I will post update, hopefully next week, when I remount optic and attempt sighting in.