Sons Of Liberty Gun Works, Bolt Carrier Group, 223 / 556 NATO

If you’re looking to build an AR-15 for hard use with standards that exceed Mil-Spec expectations, Sons of Liberty Gun Works (SOLGW) Bolt Carrier Group (BCG) is the ideal choice. Every component of this bolt carrier group is precisely heat-treated and engineered for maximum reliability and longevity. The carrier is crafted from AISI 8620 aircraft-quality steel, features a full-auto profile, and is coated with a durable manganese phosphate finish. The bolt is made from Carpenter Technology No. 158 alloy and undergoes both magnetic particle inspection and high-pressure testing to ensure many years of dependable operation.

The bolt carrier group is the heart of your AR-15, driving its entire function. Every part of a BCG has a specific role and must be manufactured to the highest standards to prevent failure. The gas key is constructed from 4130 chromoly steel and secured with grade eight, properly staked hex screws to ensure it stays firmly in place over time. This SOLGW bolt carrier group is an excellent option for building or upgrading your AR-15.