The Stoner Stoner 63 is a usa-made select-fire rifle chambered in 5.56x45mm NATO, introduced in 1963. Primary use: military. Type: Rifle Action: Select-Fire Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 1963, USA Weight: 104 oz Overall length: 43.5" Status: Discontinued Intended use: military