Alpha Premium Nitride v2 Bolt Carrier Group 5.56
- Carrier: Machined from 8620 steel & QPQ nitride/melonite treated.
- Improved carrier geometry with M16 profile.
- The QPQ nitride/melonite treatment hardends the surface to 70 RC and reduces friction, 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.
- Extractor machined from S7 tool steel
- Crane extractor O ring to boost extraction clamping force.
- Gas key: Machined from billet 4140 with grade fasteners and staked to mil spec.
Chrome plated firing pin per mil spec.