Grant Defense Nickel Boron BCG with M16 Carrier & Carpenter 158 HPT/MPI Bolt


Reliability and Performace of your rifle begins here.  Step up your platform by running our precision machined Nickel Boron BCG.  Reduce Friction = Reduced Head = Increased Oil Life = Reduced Wear & Stress of parts.



  • Nickel Boron Plated
  • Shot Peened  Carpenter No. 158 Steel Bolt
  • High Pressure Rested
  • Magnetic Particle Inspected
  • Gas Key Hardened to USGI Specifications
  • Gas Key Grade 8 Hardened Fasteners
  • Gas Key Staked Per Mil-Spec
  • Tool Steel Extractor
  • Extractor Spring
  • Extractor O-ring Insert