The Geissele Super Duty is a complete rifle built by the trigger manufacturer famous for upgrading other rifles, featuring a Geissele cold-hammer-forged barrel, Super Duty lower with integrated trigger guard, and factory Geissele SSA-E trigger. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2019, USA Weight: 7.1 oz Overall length: 35.5" Status: Active Intended use: Tactical, Precision, Home Defense