This Nuprol tactical RIS mounted torch takes 2 CR123A batteries (not included) and is activated using the ambidextrous lever on the back of the torch. Either twist the lever to toggle on or off, or press the lever in to turn on momentarily. This should fit on most railed pistols or 20mm RIS rifles.

Please note that the colour can vary from very light tan to coyote tan, please call or email to check the shade before you buy