KAK Industry M16 5.56 NATO C158 BCG - Chrome Lined Phosphate

The KAK Industry M16 5.56 BCG (MPN MO-425-3312-003) is a mil-spec-pattern M16-profile bolt carrier group machined from aircraft-grade 8620 steel and properly heat treated for hard-use service. It drops into any standard AR-15 or M16 upper receiver and is built around a C158 tool steel bolt - the same Carpenter 158 composition used on duty rifles - making it a reliable, drop-in choice for builders who want mil-spec internals without the premium price tag.

The carrier is chrome lined internally for easy cleaning and reduced carbon adhesion, while the exterior wears a black phosphate finish for corrosion resistance and a traditional GI look. This is the KAK-marked version, with both the carrier and bolt stamped with the KAK logo, designed for shooters assembling a hard-use 5.56 NATO AR-platform rifle.