KelTec RDB

Semi-automatic bullpup rifle

The KelTec RDB (Rifle, Downward-ejection, Bullpup) is a bullpup carbine offered in 5.56×45mm NATO semi-automatic rifle, manufactured by KelTec Industries of Florida. It uses a rotary bolt with a spring-loaded ejector and an extractor facing down, ejecting spent shell casings downward, allowing easy ambidextrous use.