FACTS ABOUT COLT COMBAT UNIT RAIL GUN 45 REVEALED

Lately I've seen A number of uppers which have been choose offs from rebuilt M16A1 rifles remaining offered as "new alternative uppers".    The "C" over the barrel would indicate a chrome chamber only barrel. But AFAIK, Colt marked the "C" up close to the muzzle on their early barrels, not underneath the handguards. Pic of Entrance Sight Foundati