Rainier Arms, Precison Match Bolt Carrier Group, Nickel Boron, 308/6.5 Creedmoor

The Rainier Arms Precision Match .308 BCG in Nickel Boron is machined and finished to a higher standard to meet and exceed all Mil Spec. It is machined using the most precise equipment in the industry. The bolts are MPI tested & Marked to give you ultimate confidence in your weapon system. Our Bolt now features our improved Firing Pin, optimized for 6mm & 6.5mmHigh Pressure Cartridges.

Carrier Specifications

• Full Auto Carrier
• SAE 8620
• Heat Treated
• Shot Peened
• Finish is QPQ treated
• Weight 1.2 lb

Bolt: 9310 Steel

• Shot Peened
• Heat Treated
• QPQ Treated

Extractor: S7 Tool Steel

• Precision Machined
• Shot Peened
• Heat Treated
• QPQ Treated

Extractor Retaining Pin

• Precision Machined 4140
• Heat Treated
• Precision ground to diameter
• Firing Pin:Colt Full Auto Spec
• Machined 4140
• Heat Treated