LANTAC Bolt Assembly .308/7.62 NiB 01-UP-762-NIB-BA. 5 Hardness. Magnetic Particle Inspected. NiB or Black QPQ Finished. Complete Assembly. Package Contents: LANTAC .308/7.62 Bolt Assembly LANTAC 01-UP-762-NIB-BA: Bolt Assembly .308/7.62 NiB