Question: What is a family of United States automatic rifles (machine rifles) and light machine guns used by the United States, that were produced by a company at the former Stevens-Duryea factory that was originally constructed for car manufacturing in 1912?
Sentence (from "Machine gun"): As a class of military rapid-fire guns, machine guns are fully automatic weapons designed to be used as support weapons and generally used when attached to a mount or fired from the ground on a bipod or tripod.
Relevant evidence: No