The SureFire FM45 Red Filter is a flip-up red filter that is dedicated to flashlights with a 1.37" bezel.
The smooth focused red beam produced by your SureFire flashlight with the FM45 will not degrade or impair your night vision viewing abilities. Outdoor enthusiasts often employ red-light flashlights to avoid disturbing game during twilight hours. This filter also comes in handy for non-tactical applications such as nighttime map-reading, and those predawn raids on the refrigerator.
Thumb pressure on the locking tab releases the cover, and a spring mechanism keeps the open cover flat against the flashlight's housing. A locking lever keeps the entire unit securely attached to the flashlight's bezel.
Fits 1.37" bezel
Does not impair night vision
Locking lever keeps filter securely attached to flashlight
Provides secondary protection to flashlight lens window