LBE Unlimited M16BCG-NIB Complete BCG 5.56 NATO Nickel Boron AR-15

The LBE Unlimited M16BCG-NIB Complete Bolt Carrier Group is an M16-profile BCG built for the AR-15/M16 platform and chambered in 5.56x45mm NATO. The carrier is machined from 8620 steel and finished with a low-friction Nickel Boron (NiB) coating that helps the group run clean, resist carbon fouling, and cycle smoothly across a wide range of ammunition.

This is a complete BCG with a drop-in bolt, rated for Full Auto use and fully compatible with semi-automatic AR-15, M16, and M4 pattern uppers. The NiB coating extends to the bolt, carrier, gas key, and key screws for a uniform, high-lubricity wear surface that holds tolerances under sustained fire. The package includes the firing pin and retaining pin for direct installation into a properly assembled upper receiver.

Built for shooters who want a durable, high-lubricity BCG for duty, defensive, or high-round-count rifles, the M16BCG-NIB drops directly into a properly prepped AR-platform upper.