This Surefire Replacement Scout Light Rear Cap M300 assembly for Scout Lights is designed to attach a SureFire tape switch and does not include an ST07 tape switch. The lock-out feature prevents accidental activation during tactical operations, transportation, or storage. The cap is made from aerospace-grade aluminum with MilSpec Type III hard-anodized finish and is available in black or desert tan. This cap assembly is compatible with Scout Light WeaponLights, as well as flashlights with a 0.75" diameter switch, including E1E-HA, E1B, E1L-HA-WH, E2D-BK, E2DL-BK, E2L-HA-WH, and L4-HA-WH.