Designed with input from SWAT-team leaders and active-duty special operations soldiers, the Thyrm VariArc Helmet Mount provides a full-featured lighting solution. This tactical helmet mount positively locks in the forward index position to keep your tac light aligned for critical use. With a firm twist, this mount can unlock and rotate in 8 different positions, providing you with 360 degrees of lighting. It’s also compatible with standard dovetail-style helmet rails as well as 1913 picatinny rails and will remain fully functional through extreme temperatures, water, dirt, dust, drops on concrete and rough handling.