Replace your Scout Light's rear push-button cap assembly with this cap in order to attach a SureFire tape switch. Lock-out feature positively prevents activation during tactical operations, transportation, or storage. Made from aerospace aluminum, Mil-Spec Type III hard-anodized. Available in Black or Desert Tan. Fits: Scout Light Weapon Lights, Flashlights with 0.75 inches diameter switch, including, E1E-HA, E1B, E1L-HA-WH, E2D-BK, E2DL-BK, E2L-HA-WH, L4-HA-WH. Features: Aerospace grade aluminum construction For use with a SureFire tape switch Lock-out feature prevents accidental activation