Poor quality/fitment - Aero Precision .308 Winchester Bolt Carrier Group

When I first received it I was happy with my purchase. Everything looked nice and tight, that would end up being it's down fall. When went to range the moment I racked it I could see instantly it was out of battery. Since this was a new build I checked all the tolorences and everything was fine. Pulled the BCG out and checked to see if any marks on BCG or round and all looked fine. I grabbed a spent round from my friends .308 and instantly could see it would not seat. The ejector was Soo tight I thought it would snap of I pushed any harder. By the way it never budged. Using a caliper I measured the casing @ 12 mm which is normal but on the BCG it was only 11.7 mm. So either the machining was off or they packaged it wrong. Carrier was definitely for AR10 but will not fit .308 round without some more machining.
I was gonna exchange it but after further thought decided to go with another brand. I guess once bitten twice shy.