The Angstadt Arms 5.56 Bolt Carrier Group (brand part no. AA56BCGNIT) is a complete AR-15 BCG machined to mil-spec dimensions and finished in a black nitride coating for smooth, long-lasting cycling. Angstadt Arms builds this BCG to the same quality standard it supplies to law enforcement and military groups worldwide, giving AR-15 owners a drop-in upgrade or replacement built for reliability. The black nitride finish resists corrosion and wear better than standard phosphate coatings while keeping the bolt running smoothly through extended use. Among AR bolt carrier groups, this Angstadt Arms BCG favors AR-15 builders who want mil-spec dimensions and a durable finish without paying for a full custom build.

Key Specifications

• Chambered for 5.56 NATO AR-15 platforms.
• Machined to mil-spec dimensions.
• Finished in black nitride for durability and smooth cycling.
• Built to the same standard as Angstadt’s law enforcement and military BCGs.

Frequently Asked Questions

Is this BCG mil-spec? Yes, it’s machined to mil-spec dimensions for standard AR-15 compatibility.

What finish does it use? A black nitride finish, chosen for durability and smooth, reliable cycling.

Buy the Angstadt Arms 5.56 Bolt Carrier Group

A mil-spec, black nitride BCG built to law-enforcement standards is exactly what Angstadt Arms delivers here. Order it from our Lubbock, Texas gun shop for fast shipping.