So how does that work with thermal sights? Granted, its hard to tell a small fuzy critter from a bit of exposed person. I guess just shoot everything...
If anyone knows how this works, I'd be very interested to hear it. I don't know about sights or man-portable units, but certainly the helo mountated FLIR images I've seen seem to indicate it's next to impossible to hide from that sort of thing, though perhaps only if the IR system is above you and there isn't a mile of brush in between. On the other hand, I imagine you probably don't send snipers after targets with those sorts of resources.