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This is a FailZero AR15 EXO-Coated Semi-Auto Bolt Carrier Group. A completely assembled, ready to install AR-15 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 AR-15 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. More than one of these kits have fired over 20K rounds in a standard anodized upper. Quality features include:
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
Gas Key Hardened to USGI Specifications
Grade 8 Hardened Fasteners
Black Extractor Insert
Mil-Spec Staked Gas Key
Firing Pin and retainer
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