Alpha Premium Nitride Bolt Carrier Group 5.56/.223 M16 Enhanced Cut MPI Marked
- Carrier: Machined from 8620 steel & QPQ nitride/melonite treated.
- Improved carrier geometry with M16 full auto profile.
- The QPQ nitride/melonite treatment hardends the surface to 70 RC and reduces friction as well as adding corrosion resistance inside and out.
- 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!
- FAST, FREE SHIPPING!