KAK Industries AR-15 5.56/300 Blackout BCG, Chrome Lined Phosphate, OEM

The KAK Industries AR-15 5.56/.300 Blackout Bolt Carrier Group is built for reliability and performance in demanding conditions. Featuring an M16 auto-profile carrier machined from high-quality 8620 steel, it’s finished with a chrome-lined interior and phosphate coating for excellent wear and corrosion resistance. The bolt is crafted from a single piece of 9310 steel, heat treated, precision ground, shot peened, and MPI tested to ensure dependable performance under pressure.

A chrome-plated 8740 steel firing pin delivers consistent ignition, while the phosphate-coated, one-piece billet extractor enhances reliable case extraction. The gas key, made from durable 4130 steel, is chrome lined and phosphate coated, then precision staked using Grade 8 T25 screws for long-term durability. Designed for AR-15 and M16 platforms, this OEM bolt carrier group is a solid choice for gunsmiths and shooters who demand dependable function, rugged materials, and long-lasting performance.