FailZero Lightweight EXO Nickel Boron M16 / M4 5.56 Bolt Carrier Group


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FailZero Lightweight EXO Nickel Boron M16 / M4 5.56 Bolt Carrier Group

The First in Nickel Boron Coated BCG’s

This low mass BCG provides smoother operation and less recoil resulting in faster target reacquisition for quicker follow-up rounds. This is critical in competition shooting and actual tactical situations.

This FZ Lightweight BCG runs as great as it looks! Like all FailZero products it is easier to clean and maintain, and guaranteed for life.

– 21% weight reduction from standard Mil-Spec carrier
– FZ logo engraved into the carrier
– New high polish finish on all components

– Smoother operation! Less mass helps minimize the overall movement and reduces felt recoil
– Lightweight is great for competition shooters as well as hunters looking for lighter gear
– All components are EXO Nickel Boron coated which adds to the smooth operation, extended wear and easier cleaning
– Lighter weight means faster follow up shots and better control of groupings

– Carrier weighs only 6.4 oz and complete BCG is only 9.2 oz
– Compatible in all Mil-spec AR Platforms
– All components are EXO Nickel Boron with a high polish finish
– Compatible with 5.56, .223, and 300 Blackout

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 compatible)
  • Lightweight 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

9310 Steel

Carrier Material

8620 Steel


Forward Assist Serrations




Standard AR15 components

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