Includes:FMK500 Flashlight with Integrated M-LOK Mount, Detachable Pressure Switch, 2x CR123 Batteries Materials: 6061 Aircraft Grade Aluminum Compatibility: M-LOK Rails Light Intensity: 400 lm Weight: 5 oz Length: 5.13 in Color: Black Warranty: 1 Year Warranty The Monstrum FMK 400 Lumens Weapon Light is the newest addition to our family of best-selling tactical flashlights. At 400 Lumens, the light is powerful enough for outdoor environments as well as for home defense weapons. Designed specifically for use with rifles or shotguns, with an integrated M-LOK mounting plate, the flashlight mounts securely to standard M-LOK mounting platforms. The Monstrum FMK Weapon Light comes equipped with a powerful long-lasting 400 Lumens LED bulb for indoor or outdoor usage. The FMK features an integrated M-LOK mounting plate for attachment to standard M-LOK mounting platforms. Included are both a traditional push button tail switch and a detachable remote pressure switch that allows for operation without removing your hand from the barrel.