The spent casing is being pulled from the chamber but is not ejecting every time causing the false double feed with the live round trying to feed while the spent casing is still in the bolt face. On another forum a fella suggested this fix: http://www.bravocompanyusa.com/BCM-E...%20upgrade.htm I'm not sure I understand how this will help???

Before I do anything I'm going to swap a known working BCG and see what happens then. Then I will try the different weight buffers when they get here. Thanks for all the replies and suggestions. I will keep you posted