

Product Description
The FailZero M16/M4 Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil-spec M16, M4, or AR-15 upper receivers. All critical components are treated with FailZero’s EXO Nickel Boron technology to deliver permanent dry lubricity for smoother cycling, extreme durability, and enhanced wear and corrosion resistance in demanding conditions.
Product Highlights
- Fully assembled bolt carrier group designed for quick drop-in installation
- EXO Nickel Boron treatment delivers permanent dry lubricity to reduce friction
- Enhanced wear resistance for extended service life in high-round-count use
- Improved corrosion resistance for reliability in harsh environments
- No-hammer configuration (as specified by manufacturer)
Specs
- Brand: FailZero
- Product Type: Bolt Carrier Group (BCG)
- Platform Fit: Mil-spec M16 / M4 / AR-15 upper receivers
- Coating/Finish: EXO Nickel Boron, Black finish
- Material: 8620 steel
- MPN: FZ-M16/4-01-NH-BLACK
- UPC: 094922014276
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