FOSTECH COMPLETE BOLT CARRIER GROUP (NICKEL BORON COATING)

The FOSTECH COMPLETE BOLT CARRIER GROUP with nickel boron coating is a precision-engineered AR-15 component designed for operators and shooters who demand reliability under sustained use. This complete BCG assembly serves as the heart of any modern rifle platform, converting chemical energy into cyclic operation while maintaining exacting tolerances critical for accuracy and reliability.

The nickel boron coating applied to this Fostech BCG reduces friction and wear on both the carrier and bolt surfaces, extending component life and improving bolt carrier travel smoothness—critical in suppressed fire where back-pressure demands are elevated. This coating also resists corrosion and environmental degradation more effectively than traditional finishes, making this BCG suitable for storage in field conditions or exposure to moisture and salt.

Fostech's tight manufacturing tolerances ensure proper headspace and carrier tilt geometry, essential for safe primer ignition and consistent chambering across multiple ammunition types. Law enforcement armories and military units standardize on complete BCG assemblies like this to reduce inventory complexity and ensure compatibility across rifle platforms.