The ProTac(R) Rail Mount HL-X Pro is a long range, low-profile, high candela, extreme beam reach, high lumen, gun-mounted tactical light that produces 50, 000 candela and shines for 447 meters and features the JackCap(TM) tail cap. The Jack-Cap(TM) offers operational switch redundancy - push-button operation or remote pressure switch operation. The remote pressure switch attaches to the Jack-Cap(TM) via the incorporated port. The rail clamp is designed to securely attach to rifles, carbines, and submachine guns with a MIL-STD-1913 rail or with the included M-LOK(R) mount allowing for alternative mounting options to M-LOK(R) and M-LOK(R) compatible rail systems. The light is powered by CR123A lithium batteries or Streamlight's rechargeable SL-B26(R) battery pack. | Streamlight PROTAC Firearm Rail Mount HL-X Pro Flashlight