Thanks everyone!
rimral04,
It's a Streamlight TLR-1 that clamps direct to a picattinny rail. Super compact and 135 really clean lumens, much brighter than other 200+ lumen lights I've seen. I also have a Bushwhacker red lens cover for it. The red filter is enough to see eyes out to almost 100 yards, but then when you know something is there and you are ready to identify and shoot, you pop the lens cover open, and that Streamlight will give you a good 150-200 yards of shooting light if you are in open cover. I don't know why more guys aren't using these lights, at $100 it's a bargain and probably the lightest most compact light setup I've seen.
Thanks guys!
~Matt