Alpha Premium NiB V2 5.56 Bolt Carrier Group
- Improved carrier geometry with M16 profile.
- NiB (Nickel Boron) plating reduces friction, adding corrosion resistance inside and out as well as wear resistance.
- Bolt machined from 9310 steel and MPI tested and marked.
- Carrier machined from 8620 steel.
- 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.
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