Streamlight ProTac HL-X Pro Long Gun Light, 1k Lumens & 50k Candela

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.