Made in USA, Cloud Defensive's CORv1 (Cloud Optimized Rail) is the worlds first purpose-driven hand guard that recesses your light/laser controls into your rail and seamlessly integrates your switching for truly optimal ergonomics and enhanced protection as well. It is constructed of 6061-T6 aluminum with an anodized finish, M-LOK compatibility, integrated two QD sling mounts, and utilizes the Bravo Company USA patented barrel nut assembly, providing a rock-solid lock-up to the receiver with anti-rotation tabs. The CORv1 is compatible with Cloud's Optimized Weapon Light or the Light Control System (LSS) for Surefire ST-07, low-profile gas blocks, and with both carbine-length gas systems and pistol-length gas systems. It is not compatible with piston-driven operating systems of any kind.