
Originally Posted by
NukeRJ
Look again at the colt cm platform. It is not compatible with current uppers.
Are you sure about that because the article from Defense Review says differently:
3) The CM901 universal lower receiver will accept any/all legacy MILSPEC 5.56mm NATO AR rifle/carbine/SBR upper receivers already in the U.S. military inventory, including the, Colt M4/M4A1 Carbine 14.5″ AR carbine , M4 Commando 11.5″ AR SBR, MK18/CQBR (Close Quarters Battle Receiver) 10.3″ AR SBR, and M16A3/A4 20″ DGI rifle uppers. The CM901 lower will also accept the Colt LE6940 16″ monolithic upper and Colt LE6920 16″ M4/M4A1 Carbine-type uppers.