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.
Browning Double Automatic Shotgun The Browning Double Automatic Shotgun is a short recoil operated semi-automatic (Auto Loading) 12 gauge shotgun with a 2 ¾ inch chamber. This shotgun was offered in both aluminum and steel receiver configurations with the aluminum receivers featuring a variety of finish colors. The 3 versions offered include the "Standard" as the only steel receiver version, "Twelvette", and "Twentyweight" which used the aluminium receiver. All Double Automatic's are 12 gauge. Various configurations were available for choke, barrel length, and barrel type. The firearm was produced between 1955 and 1971, with production volume of approximately 67,000.