Kak Industry Llc. K-SPEC 5.56 NATO 13.9'' BBL 1-7 TWIST COMPLETE UPPER BLACK 450-1010-060-A-B

KAK Industry K-SPEC 5.56 NATO 13.9" Complete Upper Receiver 450-1010-060-A-B KAK Industry K-SPEC 5.56 NATO 13.9" Complete Upper Black 450-1010-060-A-B UPC: 811163035552 | KAK Industry K-SPEC Series KAK Industry K-SPEC 13.9" 5.56 Complete Upper Receiver The KAK Industry K-SPEC 5.56 NATO 13.9" Complete Upper is a high-quality, ready-to-install upper receiver assembly designed for AR-15 platform rifles. Featuring a 13.9-inch barrel with a 1:7 twist rate, this complete upper offers an excellent balance of maneuverability, accuracy, and ballistic performance. The model 450-1010-060-A-B comes in a sleek black finish and includes everything needed to build or upgrade your rifle, including the upper receiver, barrel, handguard, bolt carrier group, and charging handle. Manufactured by KAK Industry, a respected name in the firearms industry known for producing durable and reliable components, the K-SPEC series represents their commitment to quality and performance. This 13.9" complete upper is particularly popular among builders looking for a compact yet effective configuration that can be pinned and welded to meet overall length requirements while maintaining optimal barrel length for the 5.56 NATO cartridge. Key Features of the KAK K-SPEC 13.9" Complete Upper 13.9" Barrel – Compact length with excellent velocity and handling characteristics. 1:7 Twist Rate – Optimized for stabilizing a wide range of 5.56 NATO and .223 Remington projectiles. Complete Upper Assembly – Includes upper receiver, barrel, handguard, BCG, and charging handle. K-SPEC Design – Built with KAK Industry’s precision engineering and quality standards. Black Finish – Durable and professional appearance. 5.56 NATO Chamber – Compatible with both 5.56 NATO and .223 Remington ammunition. Ready to Install – Drop-in ready for quick builds or upgrades. Why Choose the KAK Industry K-SPEC Complete Upper? The KAK Industry K-SPEC 5.56 13.9" Complete Upper is an excellent choice for builders and shooters who want a high-quality, pre-assembled upper receiver without the hassle of sourcing individual components. The 13.9-inch barrel length is highly sought after for its balance of compactness and performance, especially when paired with a pinned and welded muzzle device to achieve legal overall length requirements. The 1:7 twist rate ensures reliable stabilization of modern, heavier bullet weights commonly used in defensive and competition loads. KAK Industry has built a strong reputation for producing reliable and well-machined AR-15 components. This K-SPEC complete upper reflects that reputation with its attention to detail and quality construction. Whether you’re building a new rifle, upgrading an existing platform, or assembling a compact carbine for home defense or range use, the KAK Industry K-SPEC 13.9" upper provides a dependable and accurate foundation for your build. Technical Specifications Brand: KAK Industry Model: K-SPEC Caliber: 5.56 NATO / .223 Remington Barrel Length: 13.9 inches Twist Rate: 1:7 Finish: Black Part Number: 450-1010-060-A-B UPC: 811163035552 The KAK Industry K-SPEC 5.56 NATO 13.9" Complete Upper offers a premium, ready-to-go solution for AR-15 builders seeking quality, performance, and convenience. With its well-balanced barrel length and reliable components, this upper is a strong choice for a wide range of applications. Order the KAK Industry K-SPEC 13.9" Complete Upper today and experience the quality and performance of this well-engineered AR-15 upper assembly. The End