This patented Unity Tactical design is backwardly compatible with all Surefire®, Arisaka, and Modlite Scout bodies as well as Surefire UE and DS00 tail caps. Included in the package are the switch PIC mounting rails and mounting hardware - no tail cap is supplied. For best results, we recommend using the Surefire UE or DS00 tailcap, and an adapter is also available for MLOK rails. With a length of 4.5"", this switch is perfect for most setups and comes with an install torque of 5 Inch-lbs. Made in the USA with a weight of only 1.8oz, this black Modbutton Lite is a reliable and durable solution for all your lighting needs. Upgrade your weapon lights today with the Modlite Modbutton Lite 4.5inch Dual Lead (Surefire/Crane Lead). Its high power cable and switch support the power delivery needed for next-generation lighting, while its sturdy design ensures long-lasting use. With mounting options on both the left and right sides and a compact size, this switch is the perfect addition to your arsenal.