Kel-Tec RDB Defender 5.56 NATO 16.1″ Black

About this product

The Kel-Tec RDB Defender is a compact bullpup rifle that places a 5.56/.223 chambering in a shortened, balanced platform. It features Kel-Tec’s downward-ejection system and a refined trigger design aimed at improving shot control compared with traditional bullpup triggers. The Defender configuration includes an aluminum M-LOK handguard and a 16.1″ pencil-profile barrel in a black finish. An adjustable gas piston system allows the shooter to tune carrier speed for varied ammunition and suppressed use.

Key Specifications

• Chambered in .223 Rem / 5.56 NATO for compatibility with common rifle cartridges.
• The barrel measures 16.1 inches and uses a pencil profile for compact handling.
• Operates as a semi-automatic rifle suitable for a range of applications.
• The barrel twist is 1:7, supporting stabilizing a wide range of projectiles.
• Finished in black with black synthetic furniture for a subdued appearance.
• Stock and grip material are polymer to reduce weight and resist the elements.
• Features downward ejection for true ambidextrous spent-brass management.
• Includes an aluminum M-LOK handguard for accessory mounting flexibility.
• Equipped with an adjustable gas piston system to tailor operation for suppressors and varied loads.
• Ships with one 20-round Magpul PMAG (one magazine included with the firearm package).

The RDB Defender pairs a compact, well-balanced bullpup layout with practical features intended for field use and compact-carriage scenarios. Its downward-ejection architecture and adjustable gas system make it a versatile option for shooters seeking an ambidextrous, short-profile rifle that retains the ballistic advantages of standard 5.56/.223 ammunition. Built with durable polymer components and an M-LOK forend, the Defender is configured for modularity and real-world utility.