The Kel-Tec SU-16 is a semi-automatic rifle in 5.56 NATO that folds in half for storage. The SU-16 uses a gas-piston action and accepts standard AR-15 STANAG magazines. When folded it fits in a 24-inch package. The SU-16C variant adds a pistol grip and accepts higher-capacity magazines within state-legal configurations. Weighs under 5 pounds unloaded. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 10 Year introduced: 2004, USA Weight: 72 oz Overall length: 40.5" Status: Active Intended use: sporting, survival, hunting