The Fail Zero FZ EXO Bolt Assembly is a fully assembled NiB (Nickel Boron) coated bolt assembly designed for 5.56/.223 use. It is compatible with most mil‑spec AR-15, M16, and M4 carriers. The EXO Nickel Boron finish provides permanent dry lubricity along with increased wear and corrosion resistance. By reducing friction this bolt assembly simplifies cleaning and supports consistent function in range and field applications.
Key Specifications
- Compatible with most mil‑spec AR-15, M16, and M4 carriers.
- Caliber compatibility listed as 5.56/.223.
- Coating specified as Nickel Boron (NiB).
- Provided in a fully assembled configuration.
- Surface treatment offers permanent dry lubricity.
- Finish delivers increased wear and corrosion resistance.
- Designed to enable easier cleanup by reducing friction and fouling.
Built for practical reliability and low maintenance, the FZ EXO bolt assembly brings the benefits of NiB surface treatment to AR-15 platforms in a ready-to-install package. Its reduced-friction finish and corrosion resistance make it well suited for shooters who value durable components and straightforward upkeep.
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