Sons of Liberty Gun Works AR-15 6.5 Grendel/6mm ARC Bolt Carrier Group – Phosphate

AR-15 6.5 Grendel/6mm ARC Bolt Carrier Group – Phosphate

Exceptional Durability and Precision for Hard Use

The Sons of Liberty Gun Works AR-15 6.5 Grendel/6mm ARC Bolt Carrier Group (BCG) is built to exceed Mil-Spec expectations, delivering reliability and longevity for demanding applications. Precision machined from AISI 8620 aircraft-quality steel, this full-auto profile carrier features a durable manganese phosphate coating for exceptional corrosion resistance. The bolt, constructed from Carpenter Technology No. 158 Alloy, undergoes rigorous Magnetic Particle Inspection (MPI) and High Pressure Testing (HPT) to ensure consistent performance and durability. This BCG is engineered for shooters who demand the highest standards in their AR-15 builds.

Key Features

• Manganese Phosphate Finish – Provides excellent corrosion resistance for long-lasting durability.
• HPT and MPI Certified – Ensures defect-free performance and reliability through rigorous testing.
• Hard Chromed Bore and Gas Key – Enhances wear resistance and maintains smooth cycling.
• Carpenter 158 Alloy Bolt (Shot Peened) – Delivers exceptional strength and reliability for high-stress applications.
• 4340 Tool Steel Extractor (Shot Peened) – Designed for enhanced extraction reliability.
• S7 Tool Steel Ejector (Shot Peened) – Provides superior durability and resistance to impact stress.
• 8620 Alloy Carrier (Full Auto Profile) – Machined for durability and performance under heavy use.
• 4130 Chromoly Gas Key with Properly Staked Hex Screws – Prevents loosening over time, ensuring consistent performance.
• 4340 Chromoly Cam Pin and 8640 Steel Alloy Firing Pin (Chrome Plated) – Engineered for smooth operation and enhanced wear resistance.

Technical Specifications

• Finish: Manganese Phosphate
• Bolt Material: Carpenter Technology No. 158 Alloy (Shot Peened)
• Carrier Material: 8620 Alloy (Full Auto Profile)
• Gas Key Material: 4130 Chromoly Steel (Properly Staked Hex Screws)
• Extractor Material: 4340 Tool Steel (Shot Peened)
• Ejector Material: S7 Tool Steel (Shot Peened)
• Cam Pin Material: 4340 Chromoly Steel
• Firing Pin Material: 8640 Steel Alloy (Chrome Plated)

Ideal for building or upgrading AR-15s chambered in 6.5 Grendel or 6mm ARC, this BCG is designed for law enforcement, tactical shooters, competitive shooting, and high-stress applications requiring consistent performance.

Achieve superior reliability and durability with precision-engineered components. The SOLGW BCG’s high-grade materials, shot peening, and specialized treatments ensure consistent, reliable function for years to come.

Upgrade your AR-15 build with the Sons of Liberty 6.5 Grendel/6mm ARC Bolt Carrier Group for unmatched durability and reliability. Order today!