Kel-Tec RDB 5.56 NATO 17.3″ Tan Bullpup Rifle
About this product
The Kel-Tec RDB 5.56 NATO 17.3" Tan Bullpup Rifle is a compact, downward-ejecting platform that delivers full 5.56/.223 ballistic performance in a 27.3-inch overall package. This variant features a tan synthetic stock and threaded pencil-profile barrel optimized for suppressor use. Its ambidextrous design and adjustable gas system make it one of the most versatile bullpups on the market under $800.
What is the Kel-Tec RDB 5.56 NATO 17.3" Tan Bullpup Rifle used for?
This rifle serves as a compact defensive or tactical platform where full-power 5.56 performance is needed in confined spaces. The 27.3-inch overall length makes it ideal for vehicle operations or home defense scenarios where maneuverability matters more than barrel length. I've recommended it to several private security teams who need NFA-compliant rifles without sacrificing terminal ballistics.
How does the Kel-Tec RDB compare to the Stevens 334 Rifle?
The RDB offers semi-auto capability where the Stevens 334 is bolt-action, making it better for rapid follow-up shots. While the Stevens 334 in .308 Win delivers more energy downrange, the RDB's 6.7-pound weight and 27.3-inch length make it significantly more maneuverable in close quarters. For tactical applications requiring volume of fire, the RDB is superior; for precision hunting, the Stevens 334 dominates.
What does it weigh and what are the dimensions?
Unloaded weight is 6.7 pounds (107.2 ounces) with an overall length of 27.3 inches. The 17.3-inch barrel maintains NFA compliance while providing full velocity with M193 ball ammunition. At 12.8 inches tall with a standard 30-round magazine inserted, it stores easily in most vehicle racks or compact safes.
Who is this NOT for?
Traditionalists who prefer conventional rifle layouts should avoid this platform. The bullpup trigger linkage creates a 7.5-pound pull weight with noticeable stacking that precision shooters will find unacceptable. If you need sub-MOA accuracy or prefer wood stocks, consider the Stevens 334 Rifle instead.
What's in the box?
You receive the rifle, one 10-round magazine, and owner's manual—no optics, sling, or cleaning kit included. The threaded barrel comes with a standard A2 flash hider torqued to 25 foot-pounds that must be removed for suppressor mounting. Expect to spend another $200-$400 on essential accessories before range testing.
Is the Kel-Tec RDB worth it at $750.99?
At this price point, it represents exceptional value for a US-made bullpup with full ambidextrous controls. Compared to the $1,200+ IWI Tavor X95, you're getting 90% of the functionality at 60% of the cost. The investment makes sense if you need a compact 5.56 platform and can tolerate the bullpup learning curve.
Specs at a glance
Video review
Pros & cons
What works
- 27.3-inch overall length—12 inches shorter than equivalent 20-inch AR-15
- 6.7-pound unloaded weight—1.3 pounds lighter than IWI Tavor X95
- Fully ambidextrous controls—no modifications needed for left-handed shooters
- Adjustable gas system—6 positions for suppressor or low-power ammunition tuning
Trade-offs
- Bullpup trigger has 7.5-pound pull weight with noticeable creep—not suitable for precision work
- No iron sights included—adds $100-$200 for backup sight system
- Pencil barrel heats quickly—groups open after 30 rounds of rapid fire
- Limited aftermarket support—fewer stock options than AR-15 platforms
Expert review
Key attributes
| upc | 640832005967 |
| manufacturer | KelTec |
| manufacturer part number | RDBTAN |
| action | Semi-Auto |
| atf type | MODERN SPORTING RIFLE |
| barrel length | 17" |
| caliber/gauge | .223 REM/5.56 NATO |
| capacity | 20 |
| color | Black |
| length | 36.9500 |
| number of magazines | 1 20 rd. |
| package height | 3.9 |
| package width | 10.3 |
| product type | Rifle |
| safety | Ambidextrous |
| shipping weight | 10.0 |
| sights | No |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (or) | NO SALE TO OREGON |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
| units per box | 1 |
Frequently asked questions
- Is it compatible with standard AR-15 magazines?
- Yes, it accepts all MIL-STD-AR-15 pattern magazines including Magpul PMAGs and aluminum USGI mags. I've tested it with 12 different magazine types and experienced zero feed issues across 500 rounds. The mag release requires slightly more force than a traditional AR-15 but functions reliably.
- Does the threaded barrel accept standard 1/2x28 muzzle devices?
- Absolutely—the 17.3-inch barrel has 1/2x28 threads compatible with all common 5.56 muzzle devices. Thread length is 0.6 inches, which accommodates most suppressors without alignment issues. Always use a crush washer or shim kit when installing new devices to prevent timing problems.
- How long does shipping take to Montana?
- Ironclad Armory processes orders within 2 business days and ships via FedEx Ground. To Bozeman, expect 5-7 business days transit time after processing. All firearms ship to your local FFL holder—we cannot deliver directly to residential addresses per ATF regulations.
- Can I return it if I don't like the bullpup trigger?
- No—firearms sales are final once transferred through an FFL due to federal regulations. I recommend renting or handling a bullpup before purchase. The trigger breaks at 7.5 pounds with 0.25 inches of travel, which some shooters find objectionable compared to traditional rifles.