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