In the documentary Restrepo (excellent BTW), there is a scene near the end where the unit is firing down into the valley from the outpost. One of the soldiers is seated and looking into a big cube - like a sub captain into his periscope. The cube can be panned and tilted and the operator can see the various taliban members scattering as they are being shot at.
It seems a bit big just to be a pair of binoculars. Any idea what it is?
I took a screen shot and posted it here: http://i199.photobucket.com/albums/aa80/bmoresteve/Clipboard01-1.jpg
Laser targeting device maybe? I thought it may be an LRAD but I see nothing like it on a Google image search.