Based on feedback from Law Enforcement, the all new Internal Pressure Switch Mount "BIG BUTTON" improves the function and reliability of our original IPSM kit! The pressure switch on the light is captured in a backing plate, and a rubberized button pad allows the pressure switch to be activated while keeping the actual pressure switch and wiring internalized - no more velcro to hold it in place on the outside, and no more torn or mangled pressure switches! The pressure pad area has been increased over the size of the original (hence the name "BIG BUTTON") now giving you almost four times the surface area to activate the light. No more struggling to find the button; just find the raised pad area, press anywhere on it, and the light will activate. Great for light usage in high stress environments. The IPSM BIG BUTTON works with virtually any pressure switch and flashlight combination on the market- as long as there is enough room to fit the switch inside the backer plate, the IPSM BIG BUTTON will work with it. Even better, the IPSM BIG Button is designed so you can not only run a pressure switch on the left or right side of the ARClight XTL forend, but you can actually run an IPSM BIG BUTTON on BOTH sides! Great for setting up a light AND a laser on the Tavor at the same time. The IPSM kit includes the rubber big button, aluminum backing plate, adjustment screws, and instruction sheet and is 100% made in the USA.