The Daniel Defense MK18 URG Upper is a complete upper receiver group featuring a 10.3-inch Cold Hammer Forged Barrel and Black Phosphate finish. The MK18 Rail Interface System (RIS II) includes a Bolt-Up System, rigorously tested for reliability. This upper is designed for tactical applications and is compatible with .223 Rem/5.56 NATO cartridges.Key FeaturesBarrel Length: The upper features a 10.3-inch barrel, ideal for close-quarters battle (CQB) operations.Charging Handle: Equipped with an independently ambi GRIP-N-RIP Charging Handle, accommodating both left- and right-handed shooters.Sights: The upper is designed with a flat top for easy optics mounting and versatility.Carrier Group: Comes standard with an M16 profile bolt carrier group for enhanced performance.