EXO is a complementary product for the Surefire X200, X300 and X300 Ultra weapon lights for use on a carbine or long gun. It is a direct replacement for the plastic frame rails and provides a shroud for the activation switch. This gives the user a positive indexing point for light activation as well as providing protection against light ADs during use and storage without impeding access to the switch.

Note: Does NOT fit the newest revision X300U-B (600 lumen) with updated mounting system.