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.
Bushmaster M4 Carbines destroyed by Russian military forces (August, 2008)
Thanks to Vinh for the tip. Photo Copyright (c) by Edwin Le