Features:

Nickel Boron coated for optimum performance
Properly staked gas key per Mil-Spec requirements
Heat treated and shot peened per Mil-Spec Requirements
MPI tested

Specifications:

Caliber: 5.56 NATO / .223 Rem / 300 Blackout
Weight: 11.5 oz.
Material:

Carrier: 8620 Steel
Gas Key: 4130 Steel
Gas Key Screws: 4140 Steel
Cam Pin: 4340 Steel
Bolt: 9310 Steel
Extractor: E4140 Steel
Firing Pin: 420SS Steel

Finish: Nickel Boron
Profile: M16

Compatibility:

AR-15

Includes:

1x AB Arms Nickel Boron AR-15 Bolt Carrier
1x Nickel Boron Gas Key (Installed)
2x Gas Key Screws (Installed)
1x Nickel Boron Bolt
1x Cam Pin
1x Firing Pin

Details:

AB Arms offers their Nickel Boron Bolt Carrier Group for the AR-15 user who demands excellence from every component of their rifle.

The bolt carrier group is machined from the toughest steel and topped off with an impenetrable layer of nickel boron. This coating offers unfaltering protection from wear and corrosion that would ordinarily degrade a BCG over years of heavy use. The coating is also uniquely resistant to fouling, dramatically reducing the amount of time you'll spend cleaning the bolt carrier group after a long day on duty or at the range. This coating is built to last and will not wear off, flake away, or degrade even under the most constant use.