The Kel-Tec RDB Defender is a compact, lightweight bullpup rifle chambered for .223 Remington and 5.56 NATO. Its gas-piston operating system, 16.1-inch pencil-profile barrel, and 27-inch overall length provide a maneuverable platform without sacrificing rifle-caliber performance. The tan aluminum receiver includes a Picatinny optics rail, while the aluminum M-LOK handguard provides flexible accessory mounting. A collapsible polymer stock, reversible operating handle, downward ejection, and ambidextrous controls support comfortable use from either shoulder.

Key features

• Chambered for both .223 Remington and 5.56 NATO
• Gas-piston semi-automatic action supports reliable operation
• Compact bullpup configuration with a 27-inch overall length
• 16.1-inch black nitride pencil-profile steel barrel with a 1:7 twist
• 20+1 capacity
• Tan aluminum receiver with integrated Picatinny optics rail is optic ready but ships without sights or an optic specified by the factory configuration

The Kel-Tec RDB Defender combines a compact bullpup layout with ambidextrous controls, modern accessory mounting, and practical 5.56 NATO capability.