After the Russia-Georgia War of 2008, which if you recall lasted just over a week, the Russian military proudly displayed the remains of Bushmaster M4 rifles that they captured and destroyed. The M4 rifles has been part of a military aid package from the US Government. Five years on the trophies that were not destroyed are slowly making their way into museums. I am not sure which museum the above photo was taken.
Thanks to Vinh for the tip. Photo Copyright (c) by Edwin Le