Kel-Tec RDBDBLK: The Kel-Tec RDB Defender is genuinely the product of the forward-thinking engineers at the Kel-Tec R&D division. This bullpup is revolutionary thanks to the downward shell ejection system, which eliminates the side ejection system typically found on other bullpup designs. Additionally, the RDB bullpup rifle features an adjustable gas system. The RDB Defender is compatible with all standard pattern AR-15 magazines and sports an M-LOK forend for tactical accessories. Compact, versatile, and lightweight, this Kel-Tec RDB Defender is the real deal. Note - Optics shown are for demonstration purposes only and do not come with the firearm.