ALPHA 5.56 M16 Nitride Bolt Carrier Group

Specifications:

• Carrier: Machined from 8620 steel  & QPQ nitride/melonite treated.
• The QPQ nitride/melonite treatment hardends the surface to 70 RC and reduces friction as well as adding corrosion resistance inside and out.
• Compatible with 5.56, .223 and 300 BLK ammunition
• Bolt: 9310 & QPQ nitride/melonite treated with additional cryo freeze for extra strength.  Shot peened precision ground diameters.
• Magnetic particle inspected and laser marked.
• Extractors: Aircraft quality alloy steel shot peened with crane extractor O'ring installed.
• Gas key: Machined from billet 4140 with grade fasteners and staked to mil spec.
• Chrome plated firing pin per mil spec.
• MADE IN USA!
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