AR-15 Bolt Carrier Group Mil-Spec BCG (Gloss Rainbow PVD Coated)

Description

This Mil-Spec Bolt Carrier Group Mil constructed from 8620 Steel for the carrier and 9310 Steel for the bolt. The bolt is MPI tested to ensure structural integrity under high-pressure cycling. The assembly features a hydraulically staked carrier key, providing a more secure connection than standard staking methods to prevent loosening during operation. Grade 8 screws are utilized throughout to meet Mil-Spec torque and tensile strength requirements. The visual profile is defined by Gloss Rainbow PVD Coated finish on the bolt carrier, which shifts between green, blue, purple, and gold hues, while the bolt, firing pin retainer, staked screws, and CAM pin receive a Nitride finish for corrosion resistance and lubricity. Weighing 11.5 oz, this BCG offers a balanced mass for reliable cycling. It is made in the USA and includes a 1 Year Warranty. This unit is designed for builders seeking precise material specifications and durable surface treatments for their AR-15 builds.