Bolt Carrier Group for AR-16 pattern rifles from Sons of Liberty Gun Works. Bolt machined from Carpenter Technology No. 158 chrome-nickel alloy and heat treated per mil-spec. Phosphate finish. Calibers supported include 6mm ARC, 6.5 Grendel, 22 ARC, and 338 ARC. Suitable for AR-15/AR-16 platform builds.