The KelTec RDB Defender is a compact bullpup rifle chambered for .223 Remington and 5.56 NATO. Its 16.1-inch barrel delivers a practical balance of handling and performance, while the bullpup layout keeps the overall length to 27.9 inches. A collapsible synthetic stock allows the rifle to be configured for different users and storage needs. The top Picatinny rail supports a wide range of optics, and the threaded muzzle accepts compatible 1/2x28 accessories. The rifle feeds from standard AR-15-pattern magazines and provides a 20+1 capacity.

Key features

• Bullpup design provides a compact 27.9-inch overall length with a full-length 16.1-inch barrel.
• Chambered for both .223 Remington and 5.56 NATO ammunition.
• Collapsible synthetic stock supports adjustable fit and convenient storage.
• 20+1 capacity supports extended range sessions.
• Top Picatinny rail makes the rifle optic ready.
• Threaded 1/2x28 barrel supports compatible muzzle devices and suppressors where lawful.

The KelTec RDB Defender combines compact bullpup handling, flexible ammunition compatibility, and practical accessory mounting in a lightweight rifle.