Fail Zero AR-15 5.56x45mm NATO Semi-Auto BCG - Nickel Boron - No Hammer

The Fail Zero AR-15 Bolt Carrier Group is a fully assembled semi-auto BCG machined from steel and finished with Fail Zero's EXO Nickel Boron coating on all critical components. Purpose-built for the 5.56x45mm NATO chambering, this BCG is designed to drop into most mil-spec AR-15 upper receivers as a direct replacement or new-build component.

This is the No Hammer (NH) configuration, and the bolt carrier group ships without an integrated hammer. The NH layout is a natural fit for builders pairing the carrier with their preferred fire control group, or for shooters replacing a worn BCG on an existing lower without disturbing the rest of the lower's internal components. Overall dimensions measure approximately 1.65" x 3.80" x 10.30", matching the standard AR-15 BCG form factor.