A completely assembled, ready to install M16/M4 full-auto bolt and carrier system. Kit includes six critical parts that are treated with EXO Technology, a revolutionary surface technology that provides permanent dry lubricity, radically improves the performance of your M16/4 and eliminates the need to apply oil or grease to treated parts for the life of the weapon.

Specifications and Features:
Bolt
Bolt Carrier
Hammer
Extractor
Cam Pin
Carrier Key
Firing pin
EXO Nickel Boron coated