Rock River Arms Bolt Carrier Group 5.56x45mm NATO Phosphate Full-Auto

The Rock River Arms Bolt Carrier Group is a 5.56x45mm NATO BCG built for the AR-15 / M16 platform. Manufactured by Rock River Arms to the same standards the company applies to its complete rifles, it gives builders and upgraders a quality component for new builds, replacements, or upgrades.

This carrier uses the full-auto (M16) profile, featuring the extended carrier body with the auto-sear shelf machined into the bottom of the carrier. The phosphate finish provides corrosion resistance and a lubricious surface that keeps the carrier running smoothly through the firing cycle. At standard carrier dimensions of 1.15" x 2.10" x 9.25" and weighing approximately 0.78 lbs, this BCG is a drop-in fit for any standard AR-15 / M16-pattern upper receiver, bolt assembly, and gas system.