KEL-TEC120918434
Kel-Tec RDB 5.56x45mm Bullpup Rifle - Green (RDB20GRN)$819.30
Availability: In Stock
The Kel-Tec RDB 20" 5.56x45mm bullpup rifle is a modern take on a compact, magazine-fed rifle platform that doesn't sacrifice barrel length or ergonomics. Built with a synthetic stock in Flat Dark Earth (FDE) finish, the RDB delivers a tactical profile in a package that stays nimble. The semi-automatic action feeds both 5.56 NATO and .223 Remington ammunition, making it flexible for range time, precision shooting, or field use where a shorter overall length matters without going with a short-barreled rifle.
What sets the RDB apart in the bullpup category is its downward-facing extractor—a thoughtful design that keeps spent casings away from your optics and shooting partners, and the fully adjustable piston system gives you tuning options for different ammunition loads and conditions. The 20-inch barrel is long enough to wring out 5.56 velocities while the bullpup layout keeps your overall gun package compact. The birdcage flash hider tames muzzle signature, useful whether you're running suppressed or not.
This is a rifle for shooters who want something unconventional and purpose-built: not your standard AR platform, but engineered with features that reflect decades of Kel-Tec's out-of-the-box thinking. The FDE finish pairs well with modern optic setups and field gear, and the Tan synthetic furniture is durable and low-maintenance. Whether you're evaluating it for a specialized role, a dedicated 5.56 trainer, or simply exploring what a different action design offers, the RDB rewards hands-on familiarity.
| Brand | Kel-Tec |
| Model | RDB20TAN |
| Caliber | 5.56 NATO / .223 Remington |
| Barrel Length | 20 inches |
| Action Type | Semi-Automatic |
| Stock Material | Synthetic |
| Finish | Flat Dark Earth (FDE) |
| Muzzle Device | Birdcage Flash Hider |
| Piston System | Fully Adjustable |
The RDB is chambered in 5.56 NATO and .223 Remington, so you can use either military or commercial 5.56 ammo, or standard .223 hunting and range loads.
By ejecting spent casings downward instead of to the side, the downward extractor keeps hot brass away from your optics, mounted lights, and—if you're shooting alongside others—away from nearby shooters. It's a practical ergonomic feature, especially valuable in tactical or high-round-count scenarios.
Yes. The RDB features a fully adjustable piston system, which allows you to tune the action for different ammunition types and conditions, giving you options to optimize reliability and function across various loads.
The RDB comes fitted with a birdcage flash hider. While suppressor compatibility depends on the threading and specific muzzle attachment design, the inclusion of the birdcage reflects suppressed-fire considerations; consult the manual or manufacturer for verified suppressor integration details.
SKU: 120923584 • Weight: 7oz
Availability: In Stock
The Kel-Tec RDB 20" 5.56x45mm bullpup rifle is a modern take on a compact, magazine-fed rifle platform that doesn't sacrifice barrel length or ergonomics. Built with a synthetic stock in Flat Dark Earth (FDE) finish, the RDB delivers a tactical profile in a package that stays nimble. The semi-automatic action feeds both 5.56 NATO and .223 Remington ammunition, making it flexible for range time, precision shooting, or field use where a shorter overall length matters without going with a short-barreled rifle.
What sets the RDB apart in the bullpup category is its downward-facing extractor—a thoughtful design that keeps spent casings away from your optics and shooting partners, and the fully adjustable piston system gives you tuning options for different ammunition loads and conditions. The 20-inch barrel is long enough to wring out 5.56 velocities while the bullpup layout keeps your overall gun package compact. The birdcage flash hider tames muzzle signature, useful whether you're running suppressed or not.
This is a rifle for shooters who want something unconventional and purpose-built: not your standard AR platform, but engineered with features that reflect decades of Kel-Tec's out-of-the-box thinking. The FDE finish pairs well with modern optic setups and field gear, and the Tan synthetic furniture is durable and low-maintenance. Whether you're evaluating it for a specialized role, a dedicated 5.56 trainer, or simply exploring what a different action design offers, the RDB rewards hands-on familiarity.
| Brand | Kel-Tec |
| Model | RDB20TAN |
| Caliber | 5.56 NATO / .223 Remington |
| Barrel Length | 20 inches |
| Action Type | Semi-Automatic |
| Stock Material | Synthetic |
| Finish | Flat Dark Earth (FDE) |
| Muzzle Device | Birdcage Flash Hider |
| Piston System | Fully Adjustable |
The RDB is chambered in 5.56 NATO and .223 Remington, so you can use either military or commercial 5.56 ammo, or standard .223 hunting and range loads.
By ejecting spent casings downward instead of to the side, the downward extractor keeps hot brass away from your optics, mounted lights, and—if you're shooting alongside others—away from nearby shooters. It's a practical ergonomic feature, especially valuable in tactical or high-round-count scenarios.
Yes. The RDB features a fully adjustable piston system, which allows you to tune the action for different ammunition types and conditions, giving you options to optimize reliability and function across various loads.
The RDB comes fitted with a birdcage flash hider. While suppressor compatibility depends on the threading and specific muzzle attachment design, the inclusion of the birdcage reflects suppressed-fire considerations; consult the manual or manufacturer for verified suppressor integration details.
SKU: 120923584 • Weight: 7oz