The Winchester Model 30 was an experimental self-loading rifle offered to the United States War Department as an alternative to the M1 Garand.
Development had not progressed beyond limited-production prototypes when official interest faded at the end of World War II.
Winchester engineers believed the Garand required unnecessarily expensive manufacturing procedures which would make it impractical for mass production in times of emergency.
The Ordnance Department tested the initial model G30 prototype at Aberdeen Proving Ground in September 1940.
The Winchester Automatic Rifle (WAR) tested by the Ordnance Department in December 1944 was several pounds lighter than the BAR.