Olight Remote Pressure Momentary Switch for T20 Tactical Series. The Olight Remote Pressure Switch for the T20 Tactical Series MOMENTARILY activates whatever mode the light has been set to and is made to be used with any long gun - rifle or shotgun (not for pump action weapons). 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 intergrated pressure switch pocket. The Olight Tactical models are 21.6mm in diameter along the body tube. Standard weapon mounts can be made to accomodate them but Olight is working now on a custom weapon mount for picattiny rails that is expected to arrive in early May, 2008. Light & foregrip not included.