Action: Semi Auto - Caliber: 5.56 - Barrel Length: 20 - Weight: 7 lb - Through an ingenious and simple arrangement we have solved the main disadvantage of Bullpup rifles; case ejection. Traditional side ejection is not ambidextrous and forward eject like in the FN 2000 or the Kel-Tec RFB is quite complex. - The RDB (Rifle Downward-eject Bullpup) 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 hammer is U-shaped and runs outside the chute and above the magazine. Obviously the bolt travel is longer than traditional designs but well within the ergonomic constraints of a rifle. Other advantages are gravity assisted ejection higher bolt energy at feeding and a slower full auto rate (when applicable). - 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. Main Features Caliber: 5.56mm Action: Semi-Auto Barrel Length: 17.3" Finish: Blued Weight: 7 lb Other Features Caliber/Gauge: 223 Rem Color: Black Firearm Capacity: 20 Front Sight: None Gun Finish: Black Oxide Handed: Ambi Magazines Included: 1 Material: Polymer Model: 20 Optic Ready: Picatinny Rail Rear Sight: None Stock Material: Synthetic Threaded Barrel: Yes Part Number: RDB20BLK UPC: 640832002720

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