5.56 Black Rain Bolt Carrier Group – BCG

Black Rain 5.56 Nickel Boron Complete Bolt Carrier Group NIB-X 

This is PREMIUM 5.56 .223 Nickel Boron Complete Bolt Carrier Group with Nickel Boron Coating

Key Features:

• Nickel Boron Complete Bolt Carrier Group NIB-X FA Cut
• 5.56 / .223 caliber
• AR-15 / M4 / M-16 Compatible
• 100% AMERICAN MADE
• Nickel Boron coated
• Bolt – 9310 steel, case hardened, shot peened, magnetic particle inspected.
• Extractor – includes black buffer, VITON rubber LONG LASTING o-ring, and spring.
• Gas Key – properly staked grade 8 heat treated fasteners.
• Carrier – 8620 steel, heat treated, and case hardened.
• Firing Pin – 17-4 Stainless Steel
• FA Cut