COLT M4A1 CARBINE SOCOM CARBINE 5.56MM NATO 30+1 FOR DUMMIES

Charlie's provides new upper receivers, the manufacturing unit rifle get-offs have exam fired by Colt.  Upper receivers are just take-offs from out of the box rifles and likewise are purchased as upper receiver assemblies.  Both equally are 100% identical.  We don't ship in Colt manufacturing unit box.This patent-pending method cuts down the len