KAK Industry K-SPEC Enhanced Low Mass BCG 5.56 / .300 BLK for AR-15

The KAK Industry K-SPEC Enhanced Low Mass is a bolt carrier group for the AR-15 platform, built to cycle with reduced reciprocating mass for builders assembling competition or precision rifles. It is chambered for both 5.56x45mm NATO and 300 Blackout, so one carrier group covers either cartridge.

The bolt is made from 9310 steel with a dual ejector and an NP3 coated cam pin, a low friction surface intended to reduce drag and fouling buildup during cycling. The carrier is 7075 aluminum with a Satin Gold anodized finish. A down vent gas key directs gas downward, away from the shooter's face and the optic. The group is intended for mid-length or rifle-length gas systems and performs best when matched to a properly tuned gas and buffer combination.