If you find a small tactical flashlight unsatisfactory, theres always a bigger model like the FAST 502R. This light is designed for alternative mounting modes, and the R stands for M-LOK rails. Therefore, you cant attach this to other rail systems.
The 800-lumen beam can reach 200 meters. Thats enough illumination to clear a room and make out enemies farther away.
While not included, you can get a pressure switch endcap, so this flashlight is pressure-operated. That way, you can conserve battery life and keep your hand on the handguard.
To withstand battlefield stresses, the aluminum chassis is military-grade and IPX-8 waterproof.