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FailZero .458/.450 Bolt Assembly
This fully assembled and NiB coated (.458/.450) bolt assembly is compatible with most mil spec AR15, M16, M4 Carriers and will run in your .458 SOCOM and/or .450 Bushmaster. EXO Nickel Boron provides permanent dry lubricity; increased wear and corrosion resistance. By reducing friction this bolt assembly will make for easy cleanup and improve the performance of your rifle.
Nickel Boron treated parts include:
- EXO Coated Bolt - Case Hardened, Shot Peened and MPI (Magnetic Particle Inspected)
- EXO Coated Extractor (fully assembled)
- All other components are Mil-Spec