Product Overview: The KAK AR15 BCG M16 5.56 is designed for optimal performance and reliability in your AR-15 platform. Featuring an NP3 coating applied through an electroless nickel plating process, this bolt carrier group minimizes friction, enhances durability, and resists corrosion and fouling. The unique fluoropolymer component ensures that your BCG operates smoothly under various conditions, making it an excellent choice for serious shooters. Intended Use: Ideal for AR builds and tactical applications. Key Benefits: The NP3 coating enhances performance and longevity in harsh environments. Key Features: - M16 Auto Profile Carrier - 9310 Bolt - NP3 Cam Pin - 4130 Gas Key. Summary: Experience the difference with the KAK AR15 BCG M16 5.56, engineered for those who demand reliability and performance from their firearms.