30-06 cartridge, the new weapon was scaled down again to handle the. Just as the M14 in 7.62-millimeter was the M1 Garand scaled down from the. The new weapon was externally similar to the M-14 and would use the same operating system but was rechambered for the. The M14 differed from the Garand primarily in being chambered for the NATO standard 7.62-millimeter cartridge and having a 20 round removable box magazine. The M14 was a short-stroke gas piston, rotating bolt rifle that traced its roots to the World War II M1 Garand rifle. The new weapon was based on the M14 battle rifle then being phased out of service with the U.S. Sullivan went to work on a new semi-automatic rifle design. In the late 1960s, firearms designer Bill Ruger and James L.
