Rise Armament AR-15 Bolt Carrier Group - Nickel Boron

• AR-15 Bolt Carrier Group 
• Caliber: 5.56 NATO / .223 Remington 
• Precision Manufactured, Individually Inspected 
• Compatible with Lighter Buffers to Allow Faster Follow-Up Shots 
• Bolt: 9310 MPI tested 
• Carrier: 8620 Tool Steel, Heat Treated & Case Hardened 
• Gas Key: Tool Steel, Grade 8 Hardened Fasteners, Properly Staked
• Cam Pin: 4140 Steel 
• Extractor: Tool Steel - Shot Peened 
• Lightweight - Only 8.9 oz. 
• Made in the USA
• Nickel Boron Finish