The Kel-Tec SU-16E features an M4-style collapsible stock instead of the folding stock of the SU-16C, providing a more conventional feel with adjustable length of pull. Accepts AR-15 STANAG magazines. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 10 Year introduced: 2006, USA Weight: 4.9 oz Overall length: 36" Status: Active Intended use: Hunting, Home Defense