SIG P320 X5 Legion Problems

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I’ve spent quite some time in the field testing the SIG P320 X5 Legion. Trust me, I wanted to love this handgun; it has great potential. 

My experience with it gave me valuable insights into SIG P320 X5 Legion Problems you might also encounter. I stumbled upon a few hitches that need attention. 

We’re talking about outgassing issues, slide locking problems, grip concerns, recoil spring issues, and case extraction problems.

Problems I’ve Encountered & their Solutions

Outgassing IssueReplace the slide lock spring with a lighter one and polish the slide lock lever.
Slide Locking ProblemSwap the original recoil spring for an aftermarket one designed for durability and consistent recoil.
Grip ProblemFine-tune grip size, apply grip tape, adjust trigger reach, and try different backstraps.
Recoil Spring IssueContact SIG customer service for a proper fix.
Problem with Case ExtractionClean and lubricate the firearm, particularly the ejector and extractor, or replace the extractor spring and extractor.

SIG P320 X5 Legion Problems & Solutions

1. Outgassing Issue

Okay, let’s talk slide locking. During my field tests, I found myself dealing with a pretty annoying slide-locking issue. It seemed like the slide would lock back prematurely before the magazine was empty. 

This problem isn’t just frustrating; it messes with your shooting rhythm and could be dangerous in high-stakes situations.


I stripped down the gun and inspected the slide lock lever and the associated spring. 

It turned out the spring tension was too high, causing the slide to lock prematurely. The fix? I replaced the spring with a lighter one and also slightly polished the slide lock lever. 

This got rid of the issue for me. But if you’re not comfortable doing this yourself, getting a professional to do it might be your best bet.

2. Slide Locking Problem

On to the recoil spring issue. I’ve put a ton of rounds through this SIG P320 X5 Legion, and let me tell you, after about a thousand rounds, I noticed the recoil becoming inconsistent. 

Sometimes, it felt lighter, and other times, it felt like I was shooting a cannon. It was unpredictable, to say the least, making it hard to get consistent aim and fire. A recoil spring shouldn’t behave this way; it’s supposed to give you a stable, consistent shooting experience.


Here’s the deal; your recoil spring has a shelf life, and sometimes it needs a replacement. 

I decided to replace the original spring with an aftermarket one designed for longer durability and more consistent recoil. Bingo! It worked like a charm. 

Of course, this is a task you can do yourself if you’re comfortable. But if tinkering with your firearm isn’t your thing, I’d recommend getting it serviced by professionals to ensure the job is done right.

3. Grip Problem

Let’s dive into something that seriously bugged me: the grip. After hours on the range, my hands started to feel uncomfortable. 

The grip’s design just didn’t feel right, and it was affecting my performance. You can’t shoot accurately if your hand feels like it’s doing gymnastics, right?


Well, folks, I wasn’t going to let a grip issue ruin my shooting experience. I took a few steps to improve the situation. 

First, I fine-tuned the grip size and placement. I also applied grip tape to certain areas for that extra traction. Next up, I made sure the trigger reach was comfy. I even tried different backstraps to find the one that felt best. 

Guess what? All these changes made a world of difference. I significantly improved my comfort level, and shooting became much more enjoyable. If you’re experiencing similar issues, you might want to give these solutions a try.

4. Issue with the Recoil Spring

Okay, we’ve got to talk about the recoil spring. While testing the SIG P320 X5 Legion, it wasn’t all smooth sailing, especially regarding the recoil spring. 

The issues were evident and pretty frustrating. Bullets weren’t ejecting properly, the slide felt like it was fighting me every step of the way, and worst of all, the pistol sometimes wouldn’t go into battery. 

That’s right, it became inoperable when I needed it the most. Clearly, the recoil spring was the culprit behind all these headaches.


So here’s what I did. Initially, I swapped out the standard spring for a 1911 guide rod with a lighter spring. It made a difference, but let’s be honest, the problem wasn’t completely gone. 

That’s when I decided to contact SIG directly. Their customer service was on point, and they already knew about this issue. 

Following their intervention, all the recoil spring problems were sorted. If you’re stuck dealing with something similar, don’t hesitate to reach out to the manufacturer. Sometimes, that’s the best and safest course of action.

5. Problem with Case Extraction

It’s time for another issue that can throw a wrench into your shooting experience: case extraction. After firing several rounds, I noticed that the spent casings weren’t reliably ejecting. 

This led to a couple of dreaded jams that no one wants to deal with, especially in high-pressure situations. Spent casings that fail to eject properly can pose both a safety risk and a serious drawback in your shooting effectiveness.

I realized that this needed immediate attention; it’s not a problem you can just shrug off.


Here’s how I tackled it. My first instinct was to clean and lubricate the firearm thoroughly. I used a high-quality cleaner designed for firearms, focusing particularly on the ejector and the extractor. 

That improved things a bit, but not completely. So, I decided to change the extractor spring and even the extractor itself. After these changes, the problem was resolved. If you’re not confident about doing this yourself, don’t sweat it. 

Professional gunsmiths can handle this issue efficiently and make sure your firearm is in tip-top shape. Solving this problem made a significant difference in my shooting experience.

Alternatives to the SIG P320 X5 Legion

1. Glock 34

Known for its extended barrel, the Glock 34 is designed for competition shooting. It provides excellent accuracy and less recoil.

2. CZ Shadow 2

This is a shooter’s dream for action-packed sports like USPSA and IPSC. With a steel frame and high-capacity magazine, it’s built for accuracy and speed.

3. HK VP9

Designed with ergonomics in mind, the HK VP9 offers a customizable grip. It’s known for its reliability and excellent trigger system.

4. Walther Q5 Match

This one is a competition-ready pistol right out of the box. It combines exceptional trigger performance with customizable ergonomics.

5. Glock 19

Compact and versatile, the Glock 19 is suitable for both concealed carry and sporting applications. It’s reliable, durable, and works well for shooters of all experience levels.

Final Thoughts

So, what’s the final verdict on the SIG P320 X5 Legion? Look, no firearm is perfect, and this one certainly has its share of issues. 

From outgassing and slide locking to grip concerns and recoil spring problems, I’ve been through it all with this gun. 

But despite these drawbacks, the SIG P320 X5 Legion can be a reliable piece of equipment if you’re willing to put in the work to fix its issues.

Once the necessary tweaks and adjustments are made, this gun has the potential to be an excellent addition to any shooter’s arsenal.


What is the P320 X5 Legion for? 

The SIG P320 X5 Legion is designed for serious shooters, featuring a tungsten-infused grip module that increases weight to 43.5oz and reduces muzzle flip by up to 50%.

Does a SIG P320 have a trigger reset? 

Yes, the P320 has a trigger reset, but some users describe it as mushy both during the break and the reset.

How heavy is the SIG P320 X5 Legion? 

The SIG P320 X5 Legion weighs 43.5 ounces.

Is the P320 X5 Legion optic ready? 

Yes, the P320 X5 Legion comes ready to mount an optic.

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