Surprisingly useful little light. Works great laced through MOLLE, as it was designed. Runs on one AA battery, one output level, plenty useful for closeup stuff. Has a small red lens filter that's stored on the bottom of the tailcoat, and underneath that is a small compass.
I don't know how many of these are still around, if I remember right SureFire sued the living shit out of Pentagon over something about the design of their tail caps, who knows. Anyways, pretty cool little light.