5 Sig P938 Legion Problems You Must Be Aware of

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My field testing with the SIG P938 led me to a deep understanding of its inner workings and its weaknesses.

During My rigorous testing, several recurring Sig P938 Legion Problems surfaced. I am talking about guide rod problems, ejecting, jamming, not returning to full battery, and feed/extract issues. 

I aim to help you understand the typical challenges with the SIG P938 Legion and provide solutions to tackle them. I will provide practical advice to help you get the most out of this firearm. Let’s dive in, shall we?

Top 5 SIG P938 Legion Problems And Solutions

Ejecting IssuesPosition the casing’s rim over the magazine follower’s protrusion.
Jamming IssuesUse Sig Sauer or other compatible FMJ ammunition.
Not Returning To Full Battery Re-screw the separated two-piece guide rod.
Guide Rod IssuesApply red Loctite to the guide rod or consider a one-piece variant.
Feed/Extract IssuesSmooth the follower’s edge and try using HST micro ammo.

Problems & Solutions of SIG P938 Legion

1. Ejecting Issues

In My hands-on testing, I experienced challenges with the ejection of rounds. Specifically, I observed an immediate ejection of the last round when the penultimate round was introduced into the battery. 

This suggested the final round wasn’t correctly positioned within the magazine.


My recommended solution is to carefully position the casing’s rim over the small protrusion on the magazine follower, as it seemed to rectify the ejection issue. 

If the issue continues, my advice is to seek professional help from SIG’s customer service.

2. Jamming Issues

Throughout my field testing, I encountered a persistent issue with the magazines – jamming. This issue was most pronounced when the magazines were fully loaded, making them hard to secure into the mag well. 

It required significant force to ensure they locked into the P938 securely. Another associated problem was the slide getting stuck mid-way when the magazine was inserted, adding to the inconvenience.


In a surprising turn of events, I discovered no such jamming issues when I used Sig Sauer ammunition. I also found that other types of FMJ ammo, such as Federal, Blazer, and Remington, functioned without any problem. 

This observation suggests that choosing the right ammunition can dramatically improve the firearm’s performance.

3. Not Returning To Full Battery

The SIG P938 Legion sometimes gave a slightly sticky feeling and did not return to full battery after firing a series of shots. 

Upon disassembling the gun for cleaning, I discovered that the guide rod had separated.


Upon closer inspection, it was apparent that the two-piece guide rod had unscrewed. By simply screwing them back together, the issue was promptly resolved. I’ll get into the detail of 

solving the guide rod issues later below.

This highlights the importance of regular and careful maintenance for achieving consistent, smooth, and reliable firearm operation.

4. Guide Rod Issues

My hands-on review revealed a prominent issue with the firearm’s guide rod. I observed the guide rod’s tip projecting approximately 1/8 inch during disassembly. 

Although this didn’t hinder the firearm’s ability to discharge correctly, it was a concern that warranted attention.


The method I employed to address this involved a meticulous disassembling, cleaning, and applying red Loctite to the guide rod. 

When the guide rod unscrewed and separated, applying red Loctite to the threads prior to reassembling seemed to provide a fix. If this method proves ineffective, I suggest reaching out to SIG’s customer service for a replacement guide rod or substituting it with a one-piece variant.

5. Feed/Extract Issues

During my extensive testing, I detected several feed and extraction problems when different FMJ rounds and Federal HST 147gr were used. 

The firearm also experienced multiple instances of feed and extraction failures when using the three magazines that come standard with the unit.


The solution I found was straightforward. I inserted an empty magazine, placed a pencil eraser through the ejection port with the slide open, and checked for any disruptions in the movement of the magazine follower. 

Smoothing the follower’s edge and using HST micro ammo seemed to alleviate the problem significantly.


In wrapping up, The obstacles I encountered, such as ejection, jamming, feed/extract problems, and guide rod issues, were all addressable with practical, hands-on solutions or professional assistance. 

Given these, it’s clear that with the correct ammunition, regular maintenance, and attentive handling, the SIG P938 can serve as a reliable firearm. 

The key lies in understanding its specific needs and responding to them appropriately, thus mitigating any minor flaws and ensuring optimal operation.


Is Sig P938 reliable?

Yes, the Sig P938 is reliable. It’s a dependable firearm, just like any Sig Sauer product. However, some shooters have noted its “blocky” form and a long trigger pull before firing, similar to the P250.

Is Sig P938 discontinued?

Yes, some models of the Sig P938 have been discontinued. This decision by some owners was influenced by the availability of alternatives with similar dimensions and weight but simpler operations.

Is the Sig P938 a good carry gun?

Yes, the Sig P938 is considered an excellent carry gun. It offers a familiar feeling to handlers, and its concealability and reliability make it worth every penny.

Is Sig P938 all metal?

Yes, the Sig P938 is all metal. The frame is made from anodized aluminum alloy, and the slide from stainless steel, which can be either bare or with SIG’s Nitron coating.

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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.

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