Maybe it was the movie DR. NO or THE LONGEST DAY, but what first catches your eye about the Bren Gun, the iconic British light machine gun of World War 2, is that it is upside down, with the curved magazine sticking out the top instead of the bottom. But whichever way you looked at it, the Bren is one of the most successful machine guns in the history of warfare. Ask any “Brenner,” as its operators were called.