Not Too long ago I have found Several uppers that are just take offs from rebuilt M16A1 rifles being offered as "new alternative uppers". He reported the barrel is really a Faxon nitrided barrel that may be completed to seem like phosphate, but previous I heard was the barrels are https://gold-cup-trophy-colt-4523333.hyperionwiki.com/961570/colt_combat_elite_commander_45_acp_for_dummies