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Micro-Best M-16 Bolt Carrier Group MP/HP


The M-16 bolt carrier group has a carrier machined from 8620 carbon steel, that is heat treated.  Exterior of carrier is parkerized and interior is chrome-lined.  It has a Mil-Spec gas key that is chrome-lined, heat treated and secured to the carrier with Grade 8 fasteners that are properly staked.  The bolt assembly is machined from Carpenter No. 158® steel, shot-peened, MP/HP tested, and has a tool steel extractor that is machined from bar stock.

FailZero M16 Bolt Carrier Group - EXO Nickel Boron Coated - Black Finish


This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16, M4 or AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability and increases both wear and corrosion resistance. Our patented Nickel Boron coating will reduce friction and improve the overall performance of your rifle.

Nickel Boron treated parts include:
Bolt & Extractor (5.56/.223/300 Blackout compatible)
Bolt Carrier
Cam Pin
Carrier Key
Firing Pin