The Kel-Tec RDB 20 is a compact bullpup rifle chambered for .223 Remington and 5.56 NATO. Its downward-ejecting action routes spent brass through the stock behind the magazine well, making the rifle suitable for right- or left-handed operation without changing the ejection configuration. A smooth factory trigger, 1:7 twist barrel, and adjustable gas piston system support consistent performance across different loads and allow the operating system to be tuned when using a suppressor. The original RDB 20 configuration features a durable Zytel forend, a bottom Picatinny-style accessory rail, a top optic rail, and folding sights.

Key features

• Downward ejection provides truly ambidextrous operation without side-ejected brass or gas
• 20-inch 1:7 twist barrel supports .223 Remington and 5.56 NATO ammunition
• Adjustable gas piston system allows tuning for different loads and suppressed use
• Bullpup layout delivers a 30.3-inch overall length while retaining a full-length barrel
• Smooth trigger system with a factory pull range of 4.5 to 5.5 pounds
• FDE/Tan synthetic configuration uses a high-impact-resistant Zytel forend and accessory rail

The Kel-Tec RDB 20 combines a full-length barrel with a compact, fully ambidextrous bullpup design for versatile range and field use.