Nickel boron coated full-auto profile bolt carrier group.
Milspec Carpenter No. 158® steel bolt
Shot Peened Bolt
High pressure tested
Mag particle inspected
Gas Key Hardened to USGI Specifications
Gas Key Grade 8 Hardened Fasteners
Gas Key Staked Per Mil-Spec
Tool Steel Extractor
Extractor O-ring Insert
For packaging considerations, BCG will be packed dry. Nickel Boron's natural surface lubricity is not a substitute for normal rifle lubrication. Please follow all manufacturers recommendations for lubrication. It is possible to discolor the finish with dirty ammo or prolonged use without cleaning.
These parts may have cosmetic issues including, but not limited to, scratches, tool marks, or finish color imperfections, but are tested and functional.