Bolt Carrier Group SOLGW 5.56 158 Carpenter SP/HPT/MPI
The bolt-carrier group is at the heart of the AR-15, and its quality and function can mean the difference between a high-performance fighting rifle and a jam-o-matic. The Sons of Liberty Gunworks Bolt Carrier Group is a dedicated design for any AR-15 that uses high-quality materials and components to ensure the best possible performance in your gun. Each Sons of Liberty Gunworks AR-15 Bolt Carrier Group includes components made from a number of cutting-edge materials. The bolt itself is machined from Carpenter Technology No. 158 steel, which is heat-treated to military specifications, shot-peened, vibratory tumbled, and full-auto test fired in a complete assembly to ensure performance. The carrier itself is machined from AISI 8620 alloy steel and features a full-auto profile. The carrier is heat-treated, carburized, and stress-relieved.
The interface surface with the gas key is precision-ground to ensure a good fit. The gas key on the Sons of Liberty Gunworks AR-15 Bolt Carrier Group is fitted with Permatex-sealed Grade 8 hex screws, which are torqued and staked to military specs. All other carrier components are made from high-grade materials, and the extractor spring features a Sprinco 5 coil chrome-silicon wire complete with a synthetic elastomer extractor buffer.
- SP (Shot Peened): This process enhances the bolt's durability and resistance to cracking by increasing its fatigue strength.
- HPT (High Pressure Tested): The bolt undergoes rigorous high-pressure testing to ensure it can endure extreme conditions without failure.
- MPI (Magnetic Particle Inspection): This non-destructive inspection method detects surface and near-surface defects, ensuring the bolt is flawless.
These treatments guarantee that the bolt carrier group is both reliable and durable.
Restricted Part
Please check with your state regulations for ownership of Restricted Parts. May require documentation.
