KAK Industry AR-15 BCG M16 Profile 5.56 K-Spec Chrome – Drop-In Bolt Carrier Group

The KAK Industry AR-15 BCG delivers M16-profile reliability for 5.56 NATO chambered rifles. This full-auto profile bolt carrier group provides increased carrier mass for consistent cycling with suppressed firearms, adjustable gas systems, or short-barreled uppers. The K-Spec designation indicates KAK's quality control standards for machining tolerances and material specifications.

Machined from 8620 steel with a chrome-lined interior, this BCG offers corrosion resistance and easier cleaning than phosphate or nitride finishes. The chrome carrier interior extends service life in high-volume shooting applications. Gas key is secured with grade 8 fasteners and properly staked. This is a drop-in component for mil-spec AR-15 lower receivers—no fitting or gunsmithing required.

• Part Type: Bolt Carrier Group, M16 Profile
• Compatible Firearms: AR-15 pattern rifles chambered in 5.56 NATO / .223 Remington
• Material: 8620 Steel
• Finish: Chrome-lined interior
• Installation: Drop-In
• Includes: Bolt carrier, bolt assembly, cam pin, firing pin, firing pin retaining pin