Colt M4 LE6921 14.5in Stripped AR15 Upper Group 5.56 NATO 1 7 Twist 12 28 Muzzle

The Colt M4 LE6921 Upper Group 14.5in Stripped delivers a rugged, ready-to-build foundation for AR-15 enthusiasts seeking a proven platform, featuring a black anodized finish and a 14.5" carbine-length profile designed to optimize balance, ergonomics, and handling. This upper receiver group is built around a 5.56x45mm NATO cartridge compatibility with AR-15 platforms, offering a 1/7 twist rate that enhances stability for a wide range of 5.56 ammo selections and reliable feeding in dynamic field conditions. The 1/2-28 muzzle threading provides versatile options for installing muzzle devices, while the stripped design invites customization for those pursuing precision builds or duty-use configurations. With its complete style designation, Colt's upper integrates seamlessly with existing components to deliver consistent alignment, durable performance, and rapid deployment in tactical, sporting, or training environments. Its anodized black finish brings corrosion resistance and a low glare appearance, making it an ideal choice for duty, range, or hunting scenarios where dependability and quick customization matter. This upper receiver group pairs confidently with AR-15 lower assemblies to form a cohesive, high-performance platform for adaptable shooting applications.