KelTec RDB Defender 5.56 NATO 16" Black Rifle

The KelTec RDB Defender delivers compact firepower in a modern bullpup design chambered for 5.56 NATO and .223 Rem. Built with a 16-inch threaded barrel, aluminum M-LOK forend, and black synthetic stock, it combines durability with lightweight handling. At just over 26 inches long and 6.4 pounds, the RDB Defender is engineered for maneuverability while maintaining the accuracy and reliability needed in tactical and defensive applications.

Key Specifications

• Chambered in 5.56 NATO / .223 Rem for versatile performance.
• Features a 16-inch threaded barrel with 1/2x28 thread pattern for muzzle devices.
• Compact 26.1-inch overall length ideal for tight environments.
• Includes a 20-round Magpul PMAG with detachable box magazine design.
• Fitted with a black synthetic bullpup stock for strength and portability.
• Equipped with an aluminum M-LOK forend for accessory mounting.
• Weighs just 6 lbs. 4 oz., offering lightweight maneuverability.
• Built with an ambidextrous thumb safety for user versatility.
• Uses a 1-in-7 twist rate for stabilizing heavier projectiles.
• Reliable semi-automatic action in a bullpup configuration.

Frequently Asked Questions

What makes the KelTec RDB Defender unique among bullpup rifles? Its downward ejection system and compact size provide ambidextrous handling with reduced overall length. Is the RDB Defender chambered in both .223 Rem and 5.56 NATO? Yes, it safely chambers both calibers, offering shooters flexibility in ammunition choice. Does the rifle accept standard AR-15 magazines? Yes, it is compatible with standard AR-15 magazines and includes one 20-round Magpul PMAG. What is the advantage of the threaded barrel on this model? The 1/2x28 threaded barrel allows for easy attachment of suppressors or muzzle devices. The KelTec RDB Defender in 5.56 NATO / .223 Rem offers modern engineering in a compact, ambidextrous bullpup rifle. Lightweight, accurate, and versatile, it’s a tactical rifle designed for shooters who demand reliability and maneuverability in a streamlined package.