FailZero Bolt Assembly For AR-15 / M16 / M4 – 5.56/.223, Nickel Boron (EXO-BOLTASSEMBLY01)

• Bolt assembly for 5.56 and 223 AR platform rifles fully assembled
• EXO nickel boron coating provides dry lubricity and corrosion resistance
• Compatible with most mil spec AR-15 M16 and M4 bolt carriers
• Reduces friction during operation for improved reliability and performance
• Nickel finish enhances durability and simplifies cleaning maintenance
• Drop in ready bolt assembly requiring no additional fitting

The FailZero EXO Bolt Assembly Nickel is a bolt assembly designed for locking, unlocking, and extracting cartridges in AR-15, M16, and M4 platforms.

This FailZero EXO Bolt Assembly is fully assembled and Nickel Boron treated, with a nickel finish applied to critical surfaces. It is compatible with most mil-spec AR-15, M16, and M4 carriers and uses standard bolt geometry for 5.56/.223 configurations. The Nickel Boron coating provides a low-friction interface and corrosion-resistant surface in normal operation, supporting consistent cycling during range use. This product is used for replacing a worn or damaged bolt within a bolt carrier group, and the FailZero EXO Bolt Assembly interfaces with standard cam pins, firing pins, and extractors. In practical use, the assembly maintains typical dimensions and fit for drop-in installation within verified mil-spec carriers.