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.
Vz. 24 The vz. 24 rifle is a bolt-action carbine designed and produced in Czechoslovakia from 1924 to 1942. It was developed from the Mauser Gewehr 98 line, and features a very similar bolt design. The rifle was designed in Czechoslovakia shortly after World War I, to replace the Vz. 98/22, featuring a 600 mm (23.6") barrel which was shorter and considered more handy than the 150 mm (5.9") -longer Gewehr 98. The carbine followed a similar trend in weapon design at the time, that a short rifle gave away little in ballistic efficiency at combat ranges, but was easier to handle on account of its shorter length.