When Israel declared its independence in 1948, it acquired rifles—including some used by the Germans during World War II—from any source it could find. New Mausers made at FN saw service in the Israeli War of Independence, and on through the Six-Day War.
While the Iron Curtain still stood, U.S. Army Special Forces soldiers in Berlin prepared for daring and secret missions behind Warsaw Pact lines with clandestine arms in the event the Cold War went hot. Ever heard of the Welrod? How about the MPK?