Thank you. The fit is ok, the finish on this lower was not to my liking, that is why I duracoated it. If I were to do it all over again I would probably go with a TM Lower or the Mega Lower. The CMMG lower fixed trigger guard makes the area very small and I could not add a phase 5 tact. bolt release cause it hit the lower. I am happy with my lower and build still though. :) Chad