The Kel-Tec RDB Defender is a tactical bullpup rifle chambered in .223 Remington/5.56x45mm NATO, known for its compact and efficient design. It features a 16" barrel with a 1:7 twist rate that is ideal for stabilizing a wide range of bullet weights. The rifle weighs approximately 6.7 lbs, making it relatively lightweight and easy to handle, especially in dynamic shooting situations. A standout feature of the RDB Defender is its innovative downward ejection system, which enhances its usability for both right and left-handed shooters. It also boasts a smooth trigger system and an adjustable gas piston system that allows for customization according to different ammunition types or the use of a suppressor, contributing to its operational flexibility. The rifle comes equipped with a collapsible stock and an aluminum M-LOK handguard, which provides ample space for attaching various tactical accessories. The overall length of the rifle is 27", contributing to its maneuverability and making it a good choice for tactical use in confined spaces​.