The Monstrum Tactical F51 is a lightweight tactical flashlight with a built-in keymod adaptor base designed for modular attachment to keymod equipped firearms. The flashlight attaches directly to your keymod mounting platform with no extra adaptors or added bulk, providing a seamless and low profile addition to your rifle build. At 100 lumens in brightness, the light is powerful enough for indoor and close range outdoor use. The light can be used with or without the included remote pressure switch. The keymod adaptor is compatible with the standard keymod mounting platform. It comes with all mounting hardware with no additional tooling required. Ultra lightweight in profile, the flashlight measure 2.4 inches in length and a mere 1.2 ounces in weight. The flashlight is offset to the side allowing for clearance around bipods, grips, or other accessories. The light is powered by one CR2 battery included with purchase.