Out of stock
Kel-Tec RDB 20" 5.56x45mm Bullpup Rifle FDE (Flat Dark Earth) - RDB20TAN
$819.30
$895.00
(You save
$75.70
)
- Caliber-Gauge:
- 223 Remington / 5.56 NATO
- Finish-Color:
- Flat Dark Earth
- Barrel Length:
- 20"
- Barrel Length Range:
- 20" to 21.99"
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.
Key Features
- 20-inch barrel chambered in 5.56 NATO / .223 Remington
- Bullpup profile for compact handling without short-barrel compromises
- Downward-facing extractor keeps casings clear of optics and shooters
- Fully adjustable piston system for load flexibility
- Birdcage flash hider
- Flat Dark Earth synthetic stock and furniture
- Semi-automatic action
Specifications
| 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 |
Frequently Asked Questions
What ammunition does the Kel-Tec RDB fire?
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.
Why does a downward-facing extractor matter?
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.
Can I adjust the piston system for different ammunition?
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.
Is this rifle suppressor-ready?
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.
Firearm Shipments:
To buy rifles or shotguns, you must be 18 years old, and for handguns, actions, or receivers, the minimum age is 21. By placing an order for this firearm, you confirm that you are the legitimate transferee/buyer, meet the legal age requirements, and comply with all Federal, State, and local laws and regulations necessary to purchase this firearm.
We only ship firearms to valid Federal Firearms License (FFL) holders. At checkout we provide a FFL locator for your convenience.
We will need a copy of the FFL’s license to facilitate the process, kindly request your dealer to email us a copy of their FFL, as we cannot dispatch the firearm until we receive this document. It is imperative for the buyer to choose their FFL dealer, ensure they are willing to facilitate the transfer, and have them email their FFL copy to BOSQUE Outdoors. To avoid any confusion, the customer's name or order number must be mentioned in the email containing the FFL.
Email: [email protected]
- Prior to placing an order, it is the buyer's responsibility to understand and adhere to their state's firearm regulations.
- The buyer should verify with their receiving dealer that the chosen firearm is legally permissible in their state.
- The buyer is accountable for any transfer fees or background check charges imposed by the receiving dealer. If the designated dealer declines to accept the firearm delivery, the buyer assumes responsibility for shipping costs to retrieve the firearm and resend it to an accommodating dealer.
- Handguns will be shipped using air transportation, while long guns can be shipped using ground methods. If your order includes a mix of firearm and non-firearm items, BOSQUE Outdoors will send the firearm(s) to your selected FFL dealer and the remaining non-firearm items to your billing address.
- Firearms cannot be returned to BOSQUE Outdoors; please contact the manufacturer for warranty claims.
- Firearms refused by the FFL Dealer or which cannot be transferred due to a failed background check are subject to a $75 restocking fee plus 10% of the purchase price.
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