The Ruger Mini-14 is a scaled-down version of the M14 operating system, designed by L. James Sullivan using the Garand-derived gas system in a lighter, less expensive package. Popular with law enforcement, ranchers, and civilians seeking a rifle-caliber semi-automatic with classic styling, it differs from AR-15 platform rifles in its solid traditional stock and front-locked bolt design. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 20 Year introduced: 1973, USA Weight: 6.4 oz Overall length: 37.25" Status: Active Intended use: Law Enforcement, Ranching, Civilian Defense