Description
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
