Kel-Tec® RDB 5.56 NATO/.223 Remington Semi-automatic Rifle
Through an ingenious and simple arrangement, Kel-Tec® has solved the main disadvantage of Bullpup rifles: case ejection! The RDB (Rifle Downward-ejecting Bullpup) actually ejects brass DOWN, not right in your face.
The RDB Rifle features a rotary bolt with a spring loaded ejector and an extractor facing down. The spent case is pulled backwards along the top of the magazine and then ejected through a vertical chute. The bolt travel is longer than traditional designs, but still well within the ergonomic constraints of a rifle.
The RDB is built around a common steel skeleton formed by the receiver and barrel sub-assemblies. Bolt, bolt carrier, firing mechanism, ejector chute and bolt stop are identical for all variations. The short stroke gas operated piston is fully adjustable for different ammunitions and muzzle attachments.