The K-Spec BCG is designed to enhance the reliability of your AR-15 platform, whether you're running suppressed or unsuppressed, in any conditions. Built with multiple key features, it offers a true plug and play experience, seamlessly adapting to any configuration your mission demands.

Engineered for reliable performance in the most demanding conditions
Optimized for reliable performance in both suppressed and unsuppressed applications, across all uses and conditions
Dual ejectors for improved reliability and consistent ejection performance
Angled carrier rail cuts for reliable performance in adverse conditions and extended suppressed use
Downward gas ports for reduced gas blowback to the shooter
Fully auto profile
Permatex applied between the gas key and carrier mating surface for a secure and reliable seal
Carrier made from 8620 steel with outside rails, bolt runs and gas bores ground to .0002 tolerances, featuring a chrome-lined phosphate finish
Bolt made from 9310 steel with outside diameters ground to .0002 tolerances, MPI tested and finished with a phosphate coating for improved durability and corrosion-resistance
Firing pin made from 8740 steel, Swiss turned, heat-treated, precision ground and chrome-plated
Cam pin made from 4140 steel, Swiss turned, heat-treated and finished with a phosphate coating for enhanced durability and corrosion-resistance
Extractor made from 4140 steel, fully machined and finished with a phosphate coating
Extractor pin made from S7 tool steel, precision ground and heat-treated for maximum strength and durability
Ejector made from S7 tool steel, precision ground and heat-treated
Gas key made from 4130 steel, heat-treated, secured with T25 Torx fasteners, torqued to spec and staked using a hydraulic staking machine, featuring a chrome-lined phosphate finish

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These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

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KAK Industry K-Spec Enhanced Bolt Carrier Group 5.56x45mm/.300 AAC Blackout, Black