From our popular CDI Rifle, this accessorized Upper Receiver / Barrel Assembly comes complete with 15″ Windham Weaponry Aluminum M-LOK Free Float with Magpul M-LOK Hand Stop and Magpul MBUS Pro Metal Front & Rear Sights – all factory  installed. The Chrome Lined 16” M4  Barrel includes a Vortex Flash Hider. A complete Bolt Carrier Assembly and Charging Handle make this assembly ready to take to the range