Machined from bar stock C-158 steel, heat treated, shot peened, precision ground and hard coated.

  • Mil-spec dimensions
  • Carpenter 158 steel
  • Properly heat treated, shot peened and precision ground
  • MPI inspected
  • Mag Phosphate coated
  • Machined extractor
  • Included extractor insert and o-ring
  • 5.56 / .223 / 300AA

Direct Link: https://3crtactical.com/product/ar-15-5-56-carpenter-bolt-phosphate/