FailZero EXO Nickel Boron AR15 5.56 Bolt Carrier Group


5.56 NATO, Carpenter 158 Bolt, EXO Nickel Boron Coated, MPI / HP Tested

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SKU: FZ-AR15-01-NH Categories: , , Tags: , ,

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FailZero EXO Nickel Boron AR15 5.56 Bolt Carrier Group

The First in Nickel Boron Coated BCG’s

The FailZero EXO Nickel Boron AR15 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 Specifications

Manufacturer: FailZero
Material: 8620 Steel Carrier
Type: AR15
Bolt: Carpenter 158
Extractor: D2 Tool Steel
Coating: EXO Nickel Boron
Forward Assist Serrations: Yes
Compatibility: AR15
Caliber: Multi | 5.56 NATO, 223 Remington Family
Other: Shot Peened, MPI/HPT Inspected

Weight 13 oz
Dimensions 11 × 4 × 1 in


Part Type

Bolt Carrier Group, Upper Receiver Parts




223 Remington, 223 Wylde, 5.56 NATO

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