LITTLE KNOWN FACTS ABOUT COLT M4 MONOLITHIC.

Charlie's supplies new upper receivers, the factory rifle take-offs have exam fired by Colt.  Higher receivers are get-offs from out from the box rifles and also are procured as higher receiver assemblies.  The two are 100% equivalent.  We do not ship in Colt manufacturing unit box.You as well as Some others don’t recognize what which is. It e