Product DescriptionThe KAK Industry K-SPEC Enhanced AR-15 bolt is designed to improve ejection consistency and reliability in 5.56 NATO / 300 Blackout builds. Its K-SPEC dual ejector system uses standard Mil-Spec ejectors and springs (no proprietary parts), with ejector holes centered on the lugs to help maintain bolt strength. This complete assembled bolt is made from durable 9310 steel and finished in a protective phosphate coating, and it remains backwards compatible with standard Mil-Spec bolt carrier group (BCG) components for easy integration into AR-15 style direct impingement systems.Product Highlights K-SPEC dual ejector design increases ejection reliability and consistency Uses Mil-Spec ejectors and springs-no proprietary replacement parts required Centered ejector holes on lugs help avoid reduction in bolt strength 9310 steel construction with a phosphate finish for durability and wear resistance Backwards compatible with standard Mil-Spec BCG components; fits AR-15 direct impingement systemsSpecs Brand: KAK Industry Manufacturer Part Number: 303-0502-011 UPC: 811163035743 Platform: AR-15 Compatibility: 5.56 NATO / 300 Blackout Component: Complete assembled bolt only Ejector System: Dual ejector (Mil-Spec ejectors and springs) Material: 9310 steel Finish: Phosphate Operating System Compatibility: AR-15 style direct impingementDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.