K-Spec M16 5.56x45mm Nato Bolt Carrier Group - K-Spec M16 Bolt Carrier Group 5.56x45 Chrome & Phosphate Blk

K-SPEC: Mil-Spec, Enhanced. PHOSPHATE COATED & CHROME LINED OR FULL CHROME BOLT CARRIER GROUP KAK Industry's signature design for unrivaled performance and unparalleled reliability, all K-SPEC Enhanced BCGs retain mil-spec dimensions with added Slotted Angle Carrier Rails ("sand cutters") and Dual Ejector system. This 5.56 NATO model features KAK Industry's proprietary Down Vent configuration, venting gas downward instead of out at the shooter's face. This redirected gas system means a quieter