This is a FailZero Bolt Carrier Group known as the 458 SOCOM, model FZ-458-01-NH.
This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec .458 SOCOM Upper Receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity" extreme durability" and increased wear and corrosion resistance. The patented Nickel Boron coating will reduce friction and improve the overall performance of your rifle.
Features:
Nickel Boron treated
Extreme durability
Dry lubricity
Corrosion resistant
