Description
Fail Zero Uct Coatings Inc. EXO Nickel Boron M16/M4 Bolt Carrier Group is a fully assembled, drop-in part for most mil spec M16, M4, and AR15 upper receivers. The bolt carrier and critical components are coated with EXO Nickel Boron technology for permanent dry lubricity, durability, and improved wear and corrosion resistance. Finish is black.
Key features
- Fully assembled bolt carrier group
- EXO Nickel Boron coating on critical parts
- Black finish
Specifications
| Fits | M16/M4 uppers |
|---|---|
| Part Type | Bolt Carrier Group |
| Length | 10.3000 |
| Finish | Black |
| Coating | EXO Nickel Boron |




