Kel-Tec RDB Defender 5.56x45mm NATO Caliber with 16.10″ Barrel, 20+1 Capacity, Green Metal Finish

The Kel-Tec RDB Defender in 5.56 NATO / .223 Remington combines the proven RDB platform with the compact practicality of the Survival model to create a lightweight, highly versatile tactical bullpup. Featuring a 16-inch pencil profile barrel and aluminum M-LOK handguard, the Defender offers excellent balance and maneuverability in tight spaces while maintaining full 5.56 ballistic performance. Its collapsible stock and compact 27-inch overall length make it well suited for property defense, vehicle storage, or general light-duty tactical roles. Unlike traditional bullpups, the RDB utilizes a patented downward ejection system that directs spent brass through the stock behind the magazine well, making it truly ambidextrous and eliminating side ejection issues for left-handed shooters. The platform also stands out for its exceptionally smooth trigger system, delivering a clean break uncommon in bullpup designs. An adjustable gas piston system allows users to fine-tune bolt carrier speed for suppressed use or various ammunition types, enhancing reliability while reducing excessive recoil.

Chambered in .223 Remington / 5.56 NATO and finished in green, the RDB Defender weighs approximately 6.7 pounds unloaded and utilizes standard AR-15 pattern magazines with a typical 20-round capacity. It features a 16.1-inch barrel with a 1:7 twist rate for optimal stabilization of a wide range of bullet weights. Overall length measures 27 inches, and trigger pull weight ranges between 4.5 and 5.5 pounds, contributing to the rifles impressive accuracy and user-friendly handling characteristics.

Specifications