The Browning Automatic Rifle

In the interwar years US forces used the BAR across the world, from China to Nicaragua; versions equipped the armed forces of Belgium, Sweden and Poland. It also became a favorite of notorious gangsters like Clyde Barrow and Bonnie Parker, who prized its ability to punch through police armored cars as though they were made of cardboard. US lawmen rapidly acquired the BAR for themselves, with the Colt R 80 "Monitor" variant becoming the official fighting rifle of the FBI from 1931.

At the outset of World War II the US armed forces decided to adapt the BAR for a light machine gun role. The BAR was not without its flaws; it was heavy and difficult to dismantle and reassemble, and it didn't cope well with sustained fire. Nevertheless, the BAR saw action in every major theater of World War II and went on to be used in Korea and in the opening stages of the Vietnam War. Brigadier General S.L.A. Marshall's pioneering study of men in combat revealed the tremendous psychological boost that the BAR gave to a squad in the field; Marshall discovered that riflemen were so glad to have a BAR in their midst that they readily volunteered to carry extra ammunition for their gunner.