Description
The Kel-Tec RDB Bullpup, .223/5.56, 17″ Barrel, 20rd, OD Green is a modern, forward-ejecting bullpup rifle that packs a full-length barrel into a compact, maneuverable package. It’s a unique, American-made design that rethinks the 5.56 platform for efficiency and handling. I’ve put a few hundred rounds of mixed brass and steel case through one, and its distinct feel and reliable function make it a standout in the crowded tactical rifle market.
Key Features
- Downward Ejection: Brass is ejected straight down through the grip, making it truly ambidextrous with zero gas or brass to the face.
- Compact Bullpup Design: The 17-inch barrel gives you rifle ballistics in an overall length of just 26.1 inches—shorter than most SBRs without the tax stamp.
- Adjustable Gas System: A simple, tool-free adjustment lets you tune the action for different ammo or suppressor use.
- OD Green Finish: A durable, tactical green finish that stands out from the usual black and provides a solid, non-reflective surface.
Specifications & Details
| Caliber | .223 Remington / 5.56x45mm NATO |
|---|---|
| Barrel Length | 17 inches |
| Overall Length | 26.1 inches |
| Weight (Unloaded) | 6.7 lbs |
| Magazine Capacity | 20 Rounds (Accepts standard AR-15/M4 magazines) |
| Action | Gas-operated, rotating bolt |
Here’s the thing—the RDB’s genius is in its simplicity where it counts. The trigger linkage is surprisingly good for a bullpup, breaking cleanly without the mush you often find. The safety and magazine release are fully ambidextrous, and the whole system is drop-in ready with any mil-spec AR-15 magazine you already own, from Magpul PMAGs to Lancer L5AWM. At $1003.35, it’s priced as a compelling alternative to imported bullpups, offering stateside design and support.
Who This Rifle Is For
This is for the shooter who values a compact footprint without sacrificing barrel length and velocity. It’s ideal for vehicle use, home defense where maneuverability is key, or as a unique and fun range rifle that sparks conversations. If you’re tired of the AR-15 platform but want to stay in the ubiquitous 5.56 caliber, the RDB presents a seriously functional alternative. The 6.7-pound weight makes it easy to handle for extended periods, a real benefit over some heavier bullpup designs.
Pros & Cons
Pros: The ambidextrous, downward-ejecting system is a genuine innovation that works flawlessly. The compact size for the barrel length is its biggest selling point. The adjustable gas block is a premium feature that adds versatility, especially for suppressed shooting. It feeds from the vast ecosystem of AR magazines.
Cons: Field stripping is more involved than an AR-15. The cheek weld on the standard stock can feel a bit high for some optics. Reloading drills require a slight adjustment in muscle memory compared to a traditional rifle layout.
Frequently Asked Questions
Q: Is the RDB truly ambidextrous?
A: Yes, completely. The downward ejection means there’s no side port, so left-handed shooters can use it with zero modifications or concerns about gas or brass.
Q: How is the trigger on a bullpup like this?
A: It’s better than most. Kel-Tec uses a clever linkage system. It’s not a match-grade Geissele, but it’s a crisp, predictable single-stage pull that won’t hold you back.
Q: Can I mount a suppressor or muzzle device?
A: Absolutely. The barrel is threaded 1/2×28, the standard for .223/5.56, so all your common muzzle brakes, compensators, and suppressors will fit right on.
If you’re looking for a compact, capable, and genuinely innovative 5.56 rifle that breaks from tradition, the Kel-Tec RDB in OD Green deserves a close look. This model is available at firearms-missouri.com for Missouri residents and nationwide. See the full details on our site.
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