Features:

Nickle Boron coated bolt, gas key, and bolt carrier, heat treated & hardened
Hardened and staked gas key
Grade 8 hardened fasteners
Type III sealing compound
HPT/MPI bolt and extractor with Mil-Spec gas rings

Specifications:

Caliber: 5.56 NATO / .223 Rem / 300 Blackout
Material:

Carrier: Mil-Spec 8620 tool steel
Bolt: 158 Carpenter Steel

Finish: Nickle Boron
Weight: 11.15 oz.
Profile: AR-15

Compatibility:

AR-15

Includes:

1x Bolt Assembly
1x Extractor
1x Cam Pin
1x Electroless Nickel Plated Bolt Carrier
1x Carrier Key
1x Firing Pin
1x Firing Pin Retaining Pin

Details:

No matter what type of AR15 you are building, it will require a top-notch bolt carrier group (BCG) like this one from Phase 5 Tactical.

All components of this bolt carrier group are milled and polished in accordance with Phase 5 Tactical's stringent standards of quality. The parts then go through several hardening processes to make sure they are up to the job. The bolt carrier group is coated with Nickel Boron to provide further protection. This type of coating significantly outperforms other standard coating methods. The layer of nickel boron is much more uniform. It also forms an indestructible bond with the substrate metal.

Nickle Boron coating gives the carrier a natural degree of lubricity, allowing your weapon to function even when it is short on lubricant. In addition, it does not absorb fouling like other surfaces, so you'll be able to clean your BCG much quicker.

Installing this component on your AR15 will give you the advantage of the Phase 5 Tactical brand and the incredible benefits of electroless nickel plating!