The Surefire FM35 Red Flashlight Lens Filter for 1.25 Diameter Bezels gives hunters a tactical advantage when searching for game during pre-dawn hours. Since game such as deer cannot see well in the red color spectrum, the smooth red light that is cast from the lens filter keeps deer from becoming spooked. Then you can move in as you like without the fear of detection.
For non-hunters, this red flashlight filter is also great for non-tactical applications such as map reading in the dark. It produces a nice beam of light that will not degrade your night vision as a white light is apt to do.
In terms of tactility, all you have to do is apply thumb pressure to the locking tab and the cover is released. A spring mechanism keeps the cover out of the way while you can open it by holding it flush against the flashlight. The entire unit is securely attached to the flashlight via a cam-locking lever.
Fits: The Surefire FM35 red flashlight filter fits all flashlights and WeaponLights with a 1.25" bezel