Kel-Tec RDB (Rifle, Downward-ejecting Bullpup) — 5.56mm bullpup ejecting cases downward and forward, allowing ambidextrous operation. 17.3-inch barrel standard. More affordable than competitive bullpups while offering the compactness benefit. Type: Rifle Action: Gas-Operated Caliber: 5.56x45mm NATO Capacity: 10 Year introduced: 2015, USA Weight: 64 oz Overall length: 29" Status: Active Intended use: sport, self_defense