The Browning .50 Caliber Machine Guns, by Tom Laemlein The .50 caliber machine gun has been a supremely powerful element of the American small arms arsenal since its entry into service during the 1920s. Whatever the environment and whatever the mission, the Browning .50 caliber guns have proven themselves dominant on the battlefield. This powerful photo study, featuring many never before seen images, shows American .50 caliber weapons (both water-cooled and air-cooled) in action throughout WWII and the Korean War, showing the guns in multiple configurations and in every major combat theatre. 181 Pages, Soft Bound. More than 200 images. New Condition.