PowerTac (Momentary and Constant) Remote Pressure Switch for M5 LED Flashlight. The PowerTac Remote Pressure Switch for the M5 is a MOMENTARY and CONSTANTswitch that activates the particular mode the light has been set to. Designed to fit on any long gun - rifle or shotgun (not for pump action weapons) it's a solid combination when used with the optional weapon mount (NOT INCLUDED).Made to be fit into the integrated pressure switch pocket of a foregrip the pressure switch can also be attached with hook and look (not supplied) to any weapon that does not have an integrated pressure switch pocket.