The Buyan-M Corvette, or Project 21631, pushes the limits of what a shallow-draught warship can do. Designed for rivers and the relatively calm waters of the Caspian Sea, the Buyan-M has already seen action during the Syrian war, launching Kalibr cruise missiles on ISIS positions. Join Combat Approved to see just how versatile the small ‘Hell-raiser’, using its Russian name, actually is.