The Best AR-15 BCG Upgrade From Sons Of Liberty Gun Works
The Sons of Liberty Gun Works Bolt Carrier Group is a high-quality BCG upgrade made to the highest standards so it doesn’t fail. Every component of this bolt carrier group has been properly heat-treated and is designed for the reliability and longevity of the rifle.
It is designed to exceed Mil-Spec expectations to ensure the proper function of the rifle and is a great choice if you are building or upgrading an AR-15.
MPI Tested with Durable Manganese Phosphate Coating
The carrier is machined from AISI 8620 aircraft quality steel and features a full-auto profile with a durable manganese phosphate coating while the bolt is made from Carpenter Technology No. 158 Alloy that has been magnetic particle inspected and high pressure tested to ensure there are no hidden cracks and stress points.
It also comes with many advantages like shot peening to help improve strength and even features small improvements like a precision ground gas key interface on the carrier to help secure the gas key in place.
Features:
- Manganese phosphate finish for corrosion resistance
- HPT and MPI
- Hard chromed bore and gas key
- Carpenter Technology 158 alloy bolt (shot peened)
- 4340 Tool steel extractor (shot peened)
- S7 Tool steel ejector (shot peened)
- Full auto profile 8620 alloy carrier
- 4130 Chromoly gas key with staked hex screws
- 4340 Chromoly cam pin
- 8640 steel alloy firing pin with chrome plating
- Sons of Liberty Battle Flag logo deep laser engraved
