The Geissele Super Duty is a premium AR-15 built to the same specifications Geissele supplies to US military contracts, featuring a Geissele cold hammer-forged barrel, Super Semi-Automatic Enhanced (SSA-E) trigger, and mil-spec upper and lower. Type: Rifle Action: Semi-Auto Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2019, USA Weight: 89.6 oz Overall length: 32.5" Status: Active Military use: Yes Intended use: Military, Law Enforcement, Home Defense, Competition