Cloud Optimized Rail. 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. Your switching has never been integral to your rail system. Until now. The days of your switches being forced to work around your hand guard are over. COR puts your light/laser activation first by recessing the switching into the rail and optimizing your ergonomics in the process.