Black, Weapon-Mounted FlashlightStrobe for disorienting self defense Remote pressure switch features momentary or constant output Impact resistant tempered glass lens The Streamlight ProTac series expands into weapon mounted lights with this 350 lumen light featuring a dedicated fixed mount for Picatinny rails. It uses either a remote switch with momentary constant on operation or a standard push button tail switch, and can run on either a lithium battery or an easy to find alkaline