Sons of Liberty Gun Works treats the bolt carrier group as the heart of the AR platform — the part everything else in the cycle of operations revolves around. The Scalper BCG (brand part no. SOLGWBCG556-SCALPER) is their phosphate-finished take on that component.

Key Specifications

• Bolt carrier group for the 5.56 NATO AR platform
• Phosphate finish
• M16/M4-profile carrier with a properly staked gas key
• Carpenter 158 steel bolt with an S7 tool steel extractor
• SOLGW treats the BCG as the component that drives the AR platform’s entire cycle of operations

Frequently Asked Questions

What does a BCG actually do in an AR-15? It drives the entire cycle of operations — locking, unlocking, extracting, and ejecting — each time the rifle fires.

What finish does the Scalper BCG use? It’s finished in phosphate.

What is the carrier and bolt made from? An M16/M4-profile carrier paired with a Carpenter 158 steel bolt and S7 tool steel extractor.

Buy the SOLGW Scalper Bolt Carrier Group, Phosphate

This bolt carrier group is currently out of stock online — order it from our SONS OF LIBERTY GUN WORKS lineup, browsable in our full AR bolt carrier groups selection, from a Lubbock, TX gun shop.