A SIMPLE KEY FOR COLT M4 CARBINE MAGPUL SL GRAY UNVEILED

Charlie's supplies new higher receivers, the factory rifle just take-offs have check fired by Colt.  Upper receivers are choose-offs from out of the box rifles and also are obtained as higher receiver assemblies.  Each are 100% identical.  We don't ship in Colt manufacturing unit box.Higher receiver contains a purplish coloration to it in sure l