The Colt M4 LE6940 UPPER GROUP 16IN WITH BCG AND SIGHTS delivers a complete, ready-to-build AR-15 upper receiver experience in a Black anodized finish, designed around a 5.56x45mm NATO chambering for reliable performance with common military and sporting ammunition. This complete monolithic upper receiver is engineered for quick installation on compatible AR-15 platforms, providing a durable, integrated profile that supports consistent accuracy and streamlined handling. The 16-inch barrel length is optimized for balanced velocity and maneuverability, while the included BCG and sights ensure a functional setup out of the box, reducing assembly steps and simplifying field maintenance. Crafted to fit AR-15 configurations, this upper assembly is built to withstand demanding use, with precise machining and a robust anodized finish that resists wear and corrosion under tough conditions. Ideal for builders seeking a ready-to-go upper or upgrade to modernize an existing AR-15, the Colt upper enables reliable feeding, extraction, and cycling with standard 5.56 NATO ammunition. This versatile component blends Colts proven engineering with practical, real-world versatility for duty, training, or recreational applications.