The M1941 Johnson Light Machine Gun is a lightweight, air-cooled, gas-operated firearm designed by Melvin Johnson in the early 1940s. It was primarily used by the United States military during World War II and was notable for its unique design, which included a quick-change barrel and a top-mounted magazine. Weighing around 10.5 pounds, the M1941 was intended for infantry support, allowing soldiers to provide suppressive fire while remaining mobile. It fired the .30-06 Springfield cartridge and had a cyclic rate of approximately 500 rounds per minute, making it effective in various combat situations.