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M16/4 Full-Auto Carrier Assembly
This Full Auto Carrier Assembly is Mil-Spec grade, coated in EXO technology and will drop into any standard M16, M4 or AR15, making for easy clean up and longer wear life.
Nickel Boron treated parts include:
EXO Coated Full-Auto Bolt Carrier
EXO Coated Gas Key (Staked)
Gas Key hardened to USGI specs
Grade 8 hardened fasteners