The Del-Ton DT1040 Complete Upper Assembly delivers a ready-to-build platform for 5.56x45mm NATO rifles, featuring a 16" mid-length Chrome Moly Vanadium barrel with a manganese phosphate finish for dependable corrosion resistance and consistent performance in the field, paired with a 15" M-LOK free-float handguard that provides versatile attachment points for optics, lights, and accessories. This upper is constructed with a Mil-Spec 7075-T6 aluminum upper receiver finished in a durable black hard coat anodize, ensuring rigidity and long-term reliability during hunting, range sessions, or precision drills. The 1:7" twist rate stabilizes a wide range of 5.56 NATO projectiles, while the optic-ready design simplifies mounting your preferred sights or scopes. Ideal for builders seeking a robust base for a lightweight, mid-length configuration, the DT1040 combines Del-Tons engineering with practical accessories to support smooth cycling and accurate shots. Whether upgrading an existing lower or assembling a new rifle, this complete upper assembly offers a cohesive, high-performance option for shooters demanding reliability, modularity, and easy customization for various field applications.