Question: The Charlton Automatic Rifle was to act as a substitute for what First World War-era light machine gun of US design?
Sentence (from "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.
Relevant evidence: Yes