AR .308 Cal Nickel Boron Bolt Carrier Group

This AR .308 Nickel Boron bolt carrier group is engineered for builders and shooters who demand smooth operation, durability, and reduced maintenance from their AR-10 platform. Designed to support .308 Winchester and 7.62x51 NATO calibers, this BCG is compatible with AR-10 and similar large-frame rifle configurations.

The Nickel Boron (NiB) finish provides a slick, low-friction surface that improves cycling efficiency while reducing carbon buildup. Compared to traditional finishes, NiB offers enhanced corrosion and wear resistance, making this bolt carrier group easier to clean and well-suited for high-round-count use, duty rifles, and performance builds.

Built to MIL-SPEC standards, this bolt carrier group is manufactured for strength and reliability under demanding conditions. The gas key is properly installed for consistent gas flow and dependable operation, while precision-machined components ensure long service life and smooth performance.

This BCG comes fully assembled and drop-in ready, including the bolt, carrier, firing pin, firing pin retaining pin, cam pin, and gas key. Whether you’re completing a new build, upgrading an existing rifle, or replacing worn components, this Nickel Boron AR-10 bolt carrier group delivers reliable performance across the range and in the field.

Key Features & Specifications

• Platform Compatibility: AR-10 / Large-Frame AR

• Caliber: .308 Winchester / 7.62x51 NATO

• Finish: Nickel Boron (NiB)

• Construction: MIL-SPEC

• Performance: Smooth, reliable cycling

• Durability: Enhanced corrosion and wear resistance

• Assembly: Fully assembled, drop-in ready

• Includes: Bolt, carrier, firing pin, cam pin, firing pin retaining pin, gas key

• Use Case: Duty, range, and performance builds

Compatibility Note

Note: Designed for AR-10 and similar large-frame platforms. Always verify compatibility with your specific upper receiver and caliber configuration prior to installation.