One of the brands we trust for quality weapon and tactical lights is Streamlight, and they have the ProTac Rail Mount HL-X now available... "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.

• TEN-TAP® programming allows for selection of three different operating programs: 1) high/strobe 2) high only  3) low/high
• High: 1,000 lumens; 332m beam distance; 27,600 candela; runs 1.33 hours (CR123A); runs 1.5 hours (SL-B26)
• Low: 60 lumens; 80m beam distance; 1,600 candela; runs 20 hours (CR123A); runs 23 hours (SL-B26)
• Multi-Fuel: Uses one (1) Streamlight SL-B26® protected Li-Ion USB rechargeable battery pack; also accepts two (2) CR123A lithium batteries
• Includes remote pressure switch, push-button tail cap switch, remote retaining clips, double-sided tape, zip ties, and M-LOK® mount
• Integrated rail clamp attaches to MIL-STD-1913 (Picatinny) rails
  Easy to attach, secure mounting
• Durable, anodized aluminum construction with impact-resistant tempered glass lens
  IP67-rated with standard push-button switch installed (waterproof to 1 meter for 30 minutes); IP54-rated with remote pressure switch installed (water-resistant)
  Limited lifetime warranty"