The K-Spec dual ejector system is a high-performance upgrade designed to enhance the reliability and consistency of ejection in your AR-15. By utilizing mil spec ejectors and springs, the system avoids the need for proprietary parts, ensuring easy maintenance and replacement. The centered ejector holes on the lugs maintain the bolt's strength, preventing any reduction in structural integrity. This dual ejector system improves ejection reliability, leading to more consistent ejection patterns, particularly under demanding conditions. With KAK Industry's extensive experience in creating dual ejector systems for the AR10/LR308 platform, they've brought that same durable and reliable technology to the AR-15, making it an excellent choice for those seeking a rugged, high-performance BCG upgrade. Bolt made from 9310 steel with outside diameters ground to .0002 tolerances, MPI tested for quality assurance and phosphate-coated for enhanced corrosion-resistance and durability Extractor made from 4140 steel, fully machined for precision and phosphate-coated for enhanced durability and corrosion-resistance 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