KAK Industry K-SPEC C158 AR-15 5.56/.223/300BLK Bolt Carrier Group - Chrome Lined Phosphate

The K-SPEC BCG combines multiple key features focused on increasing the reliability of your AR15 style firearm no matter if you are running suppressed or unsuppressed, and regardless of conditions. The K-SPEC is a truly plug and play BCG that will accommodate whatever configuration your mission requires.For those running suppressed, the K-SPEC requires no additional tuning or tweaking of the gas or recoil systems to run reliably. Like all KAK BCGs, the K-SPEC is machined to the M16 full auto profile. Designed to function reliably in the toughest conditions Optimized for both Suppressed and Un-suppressed use, All uses - All Conditions Dual Ejectors for enhanced reliability Angled Carrier Rail Cuts for flawless function in adverse conditions and prolonged suppressed use Downward Gas Ports to reduce gas blowback to shooter Full Auto Profile Permatex added between Gas Key and Carrier Mating Surface Carrier- 8620 steel, outside rails, bolt runs, and gas bores ground to .0002 tolerances, chrome lined phosphate finish Bolt- C158 steel, outside diameters ground to .0002 tolerances, MPI test, Shot peened, Phosphate finish Firing Pin- 8740 steel, Swiss turned, heat treated, precision ground, chrome plated Cam Pin - 4140 steel, Swiss turned, heat treated, Phosphate finish Extractor- 4140 steel, fully machined, Phosphate finish Extractor pin- S7 tool steel, ground, heat treated Ejector- S7 tool steel, ground, heat treated Gas key - 4130 steel, heat treated, secured with T25 torx fasteners, torqued to spec, staked with hydraulic staking machine, Chrome lined phosphate 11.5 oz