The Monstrum F51 is a lightweight tactical flashlight with a universal shotgun barrel mount designed for modular attachment to most full length shotgun models. The flashlight attaches directly to our custom designed shotgun barrel mount with no extra adaptors required, providing a seamless and low profile addition to your shotgun setup. At 100 lumens in brightness, the light is suitable for indoor and close range outdoor use. The light can be used with or without the included remote pressure switch. Package also includes a modular quick detach sling swivel that attaches to the opposite side of the barrel. Both sling mount and flashlight are detachable from base allowing for standalone use. The light is powered by one CR2 battery included with purchase. 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 grips or other accessories. All parts are constructed from lightweight 6061 grade aluminum.