KAK Industry K-SPEC Enhanced AR-15 7.62x39mm Bolt Carrier Group NP3 Titanium Gray. The K-SPEC is a truly plug and play BCG that will accommodate whatever configuration your mission requires. Specifications for KAK Industry K-SPEC Enhanced AR-15 7.62x39mm Bolt Carrier Group: Manufacturer: KAK Industry Color: Titanium Gray Finish: NP3 Carrier Material: 8620 Steel Bolt Material: 9310 Steel Caliber: 7.62x39mm Gun Make: AR Platform Gun Model: AR-15 Weight: 11.5 oz Features of KAK Industry K-SPEC Enhanced AR-15 7.62x39mm Bolt Carrier Group Designed to function reliably in the toughest conditions Optimized for both Suppressed and Un-suppressed use 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 Package Contents: KAK Industry K-SPEC Enhanced AR-15 7.62x39mm Bolt Carrier Group What firearm models does the manufacturer say KAK Industry K-SPEC Enhanced AR-15 7.62x39mm Bolt Carrier Group is compatible with? The manufacturer says that KAK Industry K-SPEC Enhanced AR-15 7.62x39mm Bolt Carrier Group is compatible with AR-15KAK Industry 425-0506-007: K-SPEC Enhanced AR-15 7.62x39mm Bolt Carrier Group NP3 Titanium Gray