FailZero EXO Nickel Boron M16 / M4 5.56 Bolt Carrier Group

SKU: FZ-M164-01-NH

In stock

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FailZero EXO Nickel Boron M16 / M4 5.56 Bolt Carrier Group

The First in Nickel Boron Coated BCG’s

The FailZero EXO Nickel Boron M16 / M4 556 Bolt Carrier Group comes fully assembled and ready to drop into most mil spec AR15 upper receivers. Featuring an expertly machined 8620 Steel Carrier and Carpenter 158 Steel bolt, both shot peened, Magnetic Particle Inspected (MPI) and High Pressure Tested (HPT). 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. Our FailZero carriers are laser etched with the FailZero logo, and are 100% made in North Carolina, USA.

Nickel Boron treated parts include:

  • Bolt & Extractor (5.56/.223 compatible)
  • Bolt Carrier
  • Extractor
  • Cam Pin
  • Carrier Key
  • Firing Pin

Product Information

Part Type

Bolt Carrier Group, Upper Receiver Parts

Made in USA




Coating Type

Nickel Boron


223 Rem, 300 Blackout, 350 Legend, 5.56 NATO

Bolt Material

C158 Steel

Carrier Material

8620 Steel


Forward Assist Serrations




Standard AR15 components

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