Modular semi-automatic rifle with a 16-inch barrel and quick-change caliber system supporting over a dozen cartridges. Short-stroke gas piston with adjustable regulator. Folding stock. American-made precision rifle. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2007, USA Weight: 7.5 oz Overall length: 36" Status: Active Intended use: Range / Hunting / Precision