By Tom Ring
Thanks to the ingenuity of one man, a Marine infantry unit serving in the Korean War was equipped with M1Garand rifles capable of full-auto fire. This is the story of selective fire Garands built by then Marine Staff Sergeant Harold Johnson that were used in combat during the Korean War.
More Here: How One Marine Sergeant Worked in the Korean War Trenches to Outfit His Unit with Select-Fire Garands - Small Arms Review