Kel-Tec RDB 223 Rem/5.56 NATO Bullpup Rifle 20" Barrel Green

The Kel-Tec RDB delivers downward brass ejection and ambidextrous operation in a compact bullpup platform chambered in 223 Remington/5.56 NATO. This rifle combines a full-length 20-inch barrel with an overall length of just 27 inches, providing rifle-caliber performance in a carbine-sized package.

What Makes This Different

The RDB's downward ejection system eliminates the brass-to-face problem common with traditional bullpup designs, making it truly ambidextrous for both left and right-handed shooters. The adjustable gas system allows fine-tuning for various ammunition weights and suppressor use. Unlike conventional bullpups that require expensive proprietary magazines, the RDB accepts standard AR-15 magazines.

Key Features

• Downward brass ejection system for true ambidextrous operation
• 20-inch chrome-moly steel barrel with 1:7 twist rate
• Accepts standard AR-15/M16 magazines (30-round capacity)
• Adjustable gas system with suppressor setting
• M-LOK compatible rail system on handguard
• Single-stage trigger with approximately 5.5-pound pull weight
• Picatinny rail on receiver top for optics mounting

The RDB excels in close-quarters scenarios where maneuverability matters while maintaining the ballistic advantages of a full-length barrel. The 20-inch barrel delivers velocities comparable to traditional rifles while the compact 27-inch overall length navigates tight spaces effectively. The rifle functions reliably with both 223 Remington and 5.56 NATO ammunition across various grain weights.

Technical Specs

• Caliber: 223 Remington/5.56 NATO
• Barrel Length: 20 inches, 1:7 twist rate
• Overall Length: 27 inches
• Weight: 7.3 pounds unloaded
• Magazine Capacity: Accepts standard AR-15 magazines
• Action: Semi-automatic, gas-operated
• Stock: Fixed polymer bullpup configuration
• Finish: OD Green polymer furniture
• Country of Origin: United States

The RDB represents practical innovation in bullpup design, addressing traditional limitations while maintaining the platform's inherent advantages. Limited production runs and growing recognition among tactical shooters make this an increasingly sought-after rifle for those prioritizing compactness without sacrificing performance.