9mm Luger Bolt Carrier Group – NiB-X Nickel Boron POLISHED

Carrier – AR-15 style (heavy weight), 8620 material, heat treated, and case hardened. Manufacturing tolerances on inside diameters tightly controlled. NiB-X coated for durability and ease of cleaning.   Gas Key – Hardened to USGI Specifications and attached using grade 8 hardened fasteners. NiB-X coated. Staked per military specifications.   Designed for use with Glock style magazines. Made in USA!