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