A quick question...and a bit of topic:
Are the "accesories" on there issued weapons also issued, or are they personal items combined with there issued equipment?
Also, if they are personal items, like lights, laser sights and scopes, do they have to be cleared and approved by higher ranking officers? Or can they pretty much do what they want (to a limit, of course)?
[back on topic]
Whatever is strapped to that gun doesn't look like any traditional flashlight to me. Maybe it is in fact a laser sight...or maybe even a night vision lighting device.
I've seen some night vision video before where friendly troops could easily be identified by "infrared strobes", meaning the strobes can only seen by night vision equipment. Maybe that's what it is. But i don't see why it would be attached to a gun, usually they are attatched high on the shoulder, helmet, or backpack.
Any other guesses? Whatever it is, i hope it's helping him/her to be safe, accurate, and confident. God bless those troops!