Enhanced Super Duty variant with upgraded BCG, extended charging handle, and ambidextrous lower. The most fully-featured complete rifle Geissele offers. Type: Carbine Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2021, USA Weight: 112 oz Overall length: 32.5" Status: Active Intended use: Tactical, Law Enforcement, Sport Shooting