The quality and reliability you expect from FailZero makes this the only choice for your .458 SOCOM build. 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 permanents dry lubricity, extreme durability, increase wear and corrosion resistance. Patented Nickel Boron coating will reduce friction and improve the overall performance of your rifle.
Nickel Boron treated parts include:

Bolt & Extractor (.458 SOCOM and .450 Bushmaster compatible)
Bolt Carrier
Cam Pin
Carrier Key
Firing Pin

Manufacturer Part Number: FZ-458-01-NH; UPC 094922014931