Surplus Colt Slab Side Bolt Carrier

A smooth or "slab sided" bolt carrier group for M16 rifles. The slab side has no grooves for the forward assist. These are original vintage Colt from the 60's or 70's. These are correct for many vintage rifles such as the 601 and other pre forward assit M16 pattern rifles.

Black carriers have a chrome gas key.

Chrome are fully chrome.