.223/5.56/300BLK Nickel Boron Bolt Carrier Group


In stock

SKU: BCG-NiB Category: Tags: , ,


Nickel boron coated for lubricity and wear resistance advantages over regular nitride coatings. Also helps with carbon cleanup.

Machined to exact mil-spec dimensions. Heat treated, shot peened and relief cut.

Bolt Features:

  • Carpenter 158 steel
  • Heat treated
  • Shot peened
  • NiB coated
  • MPI tested

Bolt Carrier Features:

  • 8620 steel
  • NiB coated
  • NiB coated bore
  • Full auto M-16 style/full mass

Additional information

Weight10 oz



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