The SR-556 Takedown features a quick-detach barrel system that allows the rifle to be separated into two sub-18-inch packages without tools for storage and transport. Uses the same two-stage piston system as the standard SR-556. Type: Semi-Auto Rifle Action: Piston-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2014, USA Weight: 7.6 oz Overall length: 35.5" Status: Discontinued Intended use: Travel, Hunting, Range