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Fail Zero M16 Basic Kit EXO Coated Bolt Carrier Group and Hammer M16 AR15 M4

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A completely assembled, ready to install M16 M4 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 M4 and eliminates the need to apply oil or grease to treated parts for the life of the weapon. Treated parts include; Bolt, Bolt Carrier, Hammer, Extractor, Cam Pin, Carrier Key.

Specifications and Features:
Case Hardened, Shot Peened and MPI Bolt (Magnetic Particle Inspected)
EXO Coated Bolt (40% more wear resistant than Chrome with a very Low Coefficient of Friction)
Mil-Spec Gas Rings
EXO Coated Carrier
Gas Key with EXO Coated Exterior and Chrome Lined ID. Hardened to USGI Specifications
Mil-Spec Staked Gas Key
Grade 8 Hardened Fasteners
Black Extractor Insert
Firing Pin and retainer 
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