The Charlton Automatic Rifle was to act as a substitute for what First World War-era light machine gun of US design?
Lewis gun The Lewis gun (or Lewis automatic machine gun or Lewis automatic rifle) is a First World War-era light machine gun of US design that was perfected and mass-produced in the United Kingdom, and widely used by British and British Empire troops during the war. With its distinctive barrel cooling shroud and top-mounted pan magazine, the Lewis served to the end of the Korean War. It was also widely used as an aircraft machine gun, almost always with the cooling shroud removed, during both world wars.
Colt Model 1910 The Colt Model 1910 was a prototype .45 ACP caliber automatic pistol developed by John Browning as an improvement of the earlier Colt Model 1909, which was rejected by the United States Department of War due to the Cavalry's belief that the design was too complicated for use by enlisted men, and because it lacked a safety mechanism.