The Kel-Tec RDB Defender is a compact bullpup rifle chambered in 5.56 NATO and .223 Remington. Its rear-mounted action and 16.1-inch barrel provide a full-length rifle barrel in a compact 26.1-inch overall package. The gas-operated semi-automatic design feeds from AR-15 pattern magazines and accepts a 20-round magazine for a 20+1 capacity. A green finish, M-LOK forend, optics-compatible top rail, folding sights, and threaded muzzle support a flexible setup for range use, training, and practical rifle applications.

Key features

• Bullpup configuration delivers a full-length 16.1-inch barrel in a compact 26.1-inch overall length.
• Chambered in 5.56 NATO and .223 Remington for broad ammunition compatibility.
• Gas-operated semi-automatic action provides fast follow-up shots.
• 20+1 capacity uses widely available AR-15 pattern magazines.
• M-LOK forend supports compatible lights, grips, and other accessories.
• Optics-compatible top rail allows red dots or other aiming systems to be added easily через a standard mounting system.

The Kel-Tec RDB Defender combines compact bullpup handling with familiar AR-15 magazine compatibility and adaptable accessory mounting.