I have no info to go along with this picture sad to say. I *think* it’s a US Army SF soldier who did a little unofficial modification to his ’16 for some light sniping.
Th pic is so fuzzy it’s hard to determine much detail. The scope I am pretty sure is the Redfield accu-trac 3x-9x. And fromt he powerring it almost looks to have the Leatherwood ART system still on it. Not that it would have done anything on the mount being used. But it is interesting. It would have been taken from a Xm21 system that was maybe damaged. Who knows.