Engineered specifically for the demands of the 6mm ARC cartridge, this San Tan Tactical Bolt Carrier Group optimizes extractor geometry and bolt face tolerances for high-velocity, long-range precision shooting. Treated with a Black Nitride (QPQ) salt-bath finish, the metal surface is hardened internally and externally to increase slickness, resist carbon fouling, and protect against barrel gas erosion. It provides smooth, positive feeding and extraction required to squeeze maximum performance out of precision 6mm ARC rifles.

• Optimized Specifically for 6mm Arc Chamberings
• Deep QPQ Black Nitride Finish for Extreme Surface Hardness and Corrosion Resistance
• Enhanced Extractor and Bolt Face Engineering for Reliable Case Feeding/Ejection
• Smooth Low-friction Cycling; Ideal for Precision, Long-range, and Match Ar-15 Builds

Specifications:
Caliber: 6mm ARC (Also compatible with 6.5 Grendel Type 2)
Platform: AR-15
Finish: Black Nitride (QPQ Melonite)
Carrier Material: 8620 Steel
Bolt Material: 9310 Steel (High-Strength Alloy, Shot-Peened & MPI)
Gas Key: Hardened Steel, Fasteners Staked to Mil-Spec
Profile: Full-Auto / M16 Cut