KAK Industry K-SPEC

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, less gassy shooting experience. All KAK Industry BCGs feature a M16 (Full Auto) carrier profile, meticulously machined from 8620 steel, properly heat treated and ground to exact tolerances. Other components include: Single piece billet-machined 4140 extractor, phosphate coated for Increased reliability and corrosion resistance. INCLUDES 4340 Chrome plated cam pin. 8740 Chrome plated firing pin, precision ground and heat treated. S7 Tool Steel ejector and extractor retaining pin. 4130 Machined Billet Steel gas key, Chrome lined and Chrome plated, precision staked and Permatex sealed to the carrier. KAK Carrier Key Screws - T25 drive, Grade 8, Properly Heat Treated. ; Restricted Part