The Kel-Tec RDB (Rifle, Downward-ejecting Bullpup) is a 5.56mm bullpup semi-automatic that ejects cases downward through a chute in the stock. Like the RFB this makes the RDB fully ambidextrous without modification. The RDB accepts standard STANAG AR-15 magazines, giving it the broadest possible magazine compatibility. At 27 inches overall with a 17.3-inch barrel it is extremely compact. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2015, USA Weight: 116 oz Overall length: 27" Status: Active Intended use: tactical, sporting, home_defense