4 Common Kel-Tec RDB Problems And How To Fix

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I’ve had the chance to put the Kel-Tec RDB through its paces, taking it out in the field for some thorough testing.

During my time with the Kel-Tec RDB, a few common problems emerged. These included failure to fire, ejection issues, trigger problems, and the mag falling out. I’ve tackled these issues head-on and discovered some effective solutions. So, I figured, why not share what I’ve learned?

This article aims to help you understand these common Kel-Tec RDB problems and provide practical solutions. No need to scour the internet for hours; I’ve done the legwork for you.

Let’s dive in and get those issues sorted, shall we?

Overview of the Problems & their Solutions

Failure to FireCheck ammo, clean chamber, and clean firing pin.
Ejection IssuesClean or replace extractor, replace ejector spring, use quality ammo.
Trigger ProblemsClean trigger assembly, replace worn components.
Mag Falling OutExamine magazine catch, replace if worn, use quality magazines and ensure they’re properly seated.

Problems & Solutions for the Kel-Tec RDB

1. Failure To Fire

Alright, let’s get into it. One of the first issues I ran into with the Kel-Tec RDB was a failure to fire. You pull the trigger and expect a bang, but all you get is a silent click. 

That’s not what you want, especially if you’re relying on this firearm for something critical. After inspecting the rifle, I found that the issue could be traced back to a variety of factors, such as faulty ammunition, improper chambering, or even a dirty firing pin. 

The bottom line is a failure to fire can be pretty unsettling. It’s not just about the inconvenience; it can also pose a safety risk.


Okay, now let’s talk solutions. First things first, always follow the safety guidelines provided by the manufacturer. Once you’re sure it’s safe to proceed, examine your ammunition. If you spot any defects, swap it out. Next, inspect the chamber.

A quick cleaning might be all it takes to get things back in order. And don’t forget the firing pin; give it a good clean and oiling. In my experience, following these steps did the trick. 

But remember, if you’re not comfortable taking these steps yourself, consult a professional for maintenance. Trust me, a little bit of preventive care goes a long way in resolving this issue.

2. Ejection Issue

So, let’s move on to another issue that really grabbed my attention: ejection problems. You shoot, but the spent casing doesn’t clear the firearm as it should. Instead, it either gets stuck in the ejection port or fails to eject entirely. 

This can lead to what’s known as a “double feed,” where a spent casing and a new round try to occupy the chamber at the same time. It’s a hassle; believe me, you don’t want to deal with this at a crucial moment. 

These ejection issues can stem from a variety of reasons, including a dirty or damaged extractor, a weak ejector spring, or even the ammo itself, which might be to blame.


Alright, solution time. The first step, as always, is to follow safety procedures. Once that’s squared away, start by inspecting the extractor. If it’s dirty, give it a good clean. If it appears damaged, it might need replacing. 

A weak ejector spring can also cause ejection issues. In my experience, swapping out the spring made a world of difference. As for the ammunition, stick to reputable brands; it might cost a bit more, but you really do get what you pay for.

Again, if you’re not up for tackling these issues yourself, there’s no shame in seeking out a professional. Take it from me, these fixes worked wonders and got my Kel-Tec RDB back in action.

3. Problem with the Trigger

Let’s talk about another snag you might run into, and that’s trigger problems. You’re out there, line up your shot, and something feels off when you pull the trigger. 

It might be too hard to pull, too soft, or it could even feel “gritty.” Inconsistent trigger feel is not something you want to experience, trust me. I’ve found that the issue might be as simple as grime build-up or something more concerning, like a worn-out trigger component. 

But here’s the thing: a malfunctioning trigger isn’t just annoying; it can be downright dangerous.


Time for the fix. Safety comes first, always. After that, it’s time to get down to the nitty-gritty. Check the trigger assembly for any obvious signs of wear and tear. 

If you see something off, it might need replacement. A simple cleaning might do the trick for minor issues like grime build-up. Use a good gun solvent and a cleaning brush to clear away the gunk. 

Lubricate the assembly afterward, but be moderate; too much lube can attract more dirt. I personally found that regular cleaning and inspection drastically improved the trigger performance. 

If none of this works or you’re uncomfortable messing around with the trigger assembly, seek professional help. These steps resolved my issue, and I’ve got a feeling they’ll help you too.

4. Mag Falling Out

Here’s another issue that you don’t want cropping up at the wrong time: the magazine falling out. I’ve been there, thinking I had a full mag locked and loaded, only to find it on the ground after firing off a few rounds. 

Talk about a letdown! The issue could be due to a worn magazine catch, a faulty magazine, or even user error if the magazine isn’t properly seated in the first place. It’s frustrating, and in a high-stakes situation, it could be far worse than that.


Alright, let’s get this sorted. First, ensure you’re following all safety protocols. Then, start by examining the magazine catch. Replacing it should be your first move if it’s worn or damaged. Next, give the magazine itself a good look-over. 

Any visible wear and tear? If so, time for a new one. As for seating the magazine, make sure you hear a definitive “click” when you insert it. 

Trust me, this part is crucial. In my case, a new catch and magazine were the ultimate fix, but your mileage may vary. If all else fails, or if you’re uncomfortable doing this alone, don’t hesitate to consult a professional. A quick tune-up can make a world of difference, just like it did for me.

Final Verdict

After spending considerable time with the Kel-Tec RDB, it’s clear that while it’s a promising firearm with a lot of perks, it also has its fair share of issues. 

However, none of these problems are insurmountable. With some maintenance, quality replacement parts, and some professional help, you can make this weapon perform at its best. 

Don’t get me wrong; no firearm is perfect right out of the box. But the issues are more of an inconvenience than a deal-breaker when it comes to the Kel-Tec RDB. 

With some attention to detail and a willingness to troubleshoot, you’ll find the Kel-Tec RDB to be a reliable piece of hardware.


What is the effective range of the KelTec RDB?

The effective firing range is around 400~500 meters. This firearm can also mount various tactical accessories like flashlights or laser pointers.

How accurate is the KelTec RDB defender?

The Kel-Tec RDB is extremely accurate, especially at impressive distances, thanks to its 20.5-inch barrel and the 5.56 NATO round.

What is the difference between RDB-17 and 20? 

RDB-17 has a 17.2-inch barrel, while the RDB-20 has a 20-inch barrel. Both are chambered in 5.56 NATO.

What is the best barrel length for a rifle?

For personal defense and all-around use, a 16-inch barrel is often considered the best choice.

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I'm Micheal, an avid shooter and hunting enthusiast from Texas. I'm a recreational shooter who loves to spend time at the range and enjoy learning about new firearms and gears. I love to write about guns and share my passion for shooting with others.