No shooter ever changes their rifle magazine.
An American soldier has a Russian semi-automatic rifle disguised as an American sniper rifle.
The American sniper uses a G-43, a German self-loading rifle. Oddly, he operates this gun as if it was a bolt-action rifle.
In 2001 Neal McDonough played Lt. Buck Compton in the HBO WW2 miniseries Band of Brothers (2001). It was set in the same time frame and he played an officer who fought in the Battle of the Bulge.