The M17S was Bushmaster's bullpup AR — an unconventional design that placed the action behind the trigger group, allowing a standard 16-inch barrel in a package shorter than a carbine. Gas-operated, semi-auto only, with a distinctive clear polymer stock section. Imported from Australia initially then made in the US. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 1992, United States Weight: 96 oz Overall length: 27" Status: Discontinued Intended use: Recreational Shooting