The 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 battery.Material: AluminumType: Flashlight w/Fixed MountOutput: 350 LumensBulb Type: LEDBody Diameter: 1.2"Oal: 4.25"Weight: 4.30 ozBattery: CR 123Proofs: Water ResistantColor: BlackFor Series: Any with RailRechargeable: NoFilter Color: ClearSwitch Type: PressureHazair: Yes