That's what I said a surrender gun, kills or not they took all the spoils and the military dolled em out after the war. Some made it home because the person did not surrender it to command. ALL the ones with the MUM filed off went through channels.
My Grandpa brought home NAZI stuff, the US didn't care. NO defacing of the weapons, swords knives etc.
But for some reason when we defeated Japan, any weapon the US held from foreign combatants was defaced or destroyed. So one with the MUM intact is more valuable.