Nickel Boron Bolt Carrier Group - AR15 M16 .223 - 5.56

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Description:

This Nickel Boron Bolt Carrier Group comes fully assembled and complete ready to drop in your AR15, M16, or M4. 
  • 5.56 - .223
  • Nickel Boron
  • 9310 Steel Bolt
  • MPI Bolt (Magnetic Particle Inspected)
  • Shot Peened Bolt
  • Grade 8 Hardened Fasteners
  • Key Staked per Mil-Spec
  • Black Extractor Insert
  • Crane O-Ring