The ProTac Rail Mount HL-X is a 1,000 lumen weapon-mounted light featuring a fixed mount for MIL-STD-1913 (Picatinny) rails or with the included M-LOK mount allowing for alternative mounting options to M-LOK and M-LOK compatible rail systems. It uses either a remote pressure switch or a standard push-button tail cap switch, and can run on multiple battery types.