This fully assembled and NiB coated 6.5 Grendel bolt assembly is compatible with most mil spec AR15, M16, M4 Carriers and will run in your 6.5 Grendel only, it is NOT compatible with any other caliber. 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
• **For use in 6.5 Grendel only – Not compatible with other calibers