http://www.patreon.com/ForgottenWeapons Cool Forgotten Weapons Merch! http://shop.bbtv.com/collections/forgotten-weapons Robert F Hudson developed a series of machine guns for the US Navy during the 1920s and 1930s, including this .30 caliber example as well as .50 caliber and 1.1 inch versions. What makes these guns unusual is both the attempted use of a counter-balanced system to eliminate felt recoil and also the standard use of suppressors on the guns. I don't know much else about the guns, but you can find the documentation mentioned in the video here: http://www.forgottenweapons.com/hudson-30-cal-machine-gun-toolroom-model-video/