5 Beretta CX4 Storm Problems You Should Know

The Beretta CX4 Storm is a pistol-caliber semi-automatic carbine. The main focus of the CX4 Strom is sporting, personal defense, and law enforcement markets.

There are quite a few Beretta CX4 Storm problems known to its users.

It is known to face frequent jamming issues. Alongside failure to feed and ejecting problems. Some users also complained about issues with the bolt locking prematurely and magazines falling out.

Before moving further with the steps for Beretta CX4 Storm troubleshooting, here are some of the features and specifications of the gun.

Features & Specifications of the Beretta CX4 Storm Problems:

Beretta CX4 Storm Specs
Cartridge9×19mm (Para)/9×21mm IMI/.40 S&W/.45 ACP
Capacity8/10/15 Rounds
Barrel Length16.6 Inches
Weight90.8 Ounces (Unloaded)
Length29.7/31.5 Inches
Width2.5 Inches
Height7.5 Inches
SafetyReversible Safety
SightsAperture Rear Sight, Adjustable Front Sight
Common BERETTA CX4 STORM Problems

Common Beretta CX4 Storm Problems and Solutions

Below are some of the problems that a user might face. Along with steps to get your Beretta CX4 Storm problems fixed.

Quick Overview of the Problems and Solutions

Beretta CX4 Storm ProblemsSolutions
Jamming IssuesCleaning the gun/replacing the extractor claw
Failure to FeedUsing factory magazines
Ejecting IssueReplacing the extractor claw
Issues Regarding the BoltReplacing the magazine/mag follower
Loose MagazinesAdjusting the magazine catch spring

1. Jamming Issues:

The jamming issue can be due to several issues. The first step is to check whether the extractor claw is broken or not. As it could create jamming issues such as ammo jams, feeding issues, and failure to extract.

Or it could be due to a dirty gun as well. As the breech face and the chamber may often get dirty after shooting for a while.


The Beretta CX4 Storm should be cleaned thoroughly frequently. The breech face and the entire chamber have to be properly cleaned and the necessary parts need to be lubricated.

And if you come upon any issue regarding the extractor claw, move below to the “Ejecting Issue” section for further guidance. As I will be going through the details of the extractor claw there.

2. Failure to Feed:

Failure to feed issues tend to be due to using aftermarket magazines. Especially the 15-round Mec-Gar magazines and the 20-round ProMag magazines.


You should stick to the factory Beretta 20-round magazines. As aftermarket magazines tend to have a slightly different form factor than the factory ones.

Some have also suggested that filing down the magazine lips may help. You should file them down little by little and test firing, to check at which point the FTF issues stop.

Beretta 92FS Magazine 9mm 15Rds (Compatible with CX4 Storm)
Beretta 92FS Magazine 9mm 15Rds (Compatible with CX4 Storm)

However, sticking to the factory magazines (Fig 1) tends to the be best option to avoid failure to feed issues.

3. Ejecting Issue:

Failure to Eject on a Beretta CX4 Storm
Failure to Eject on a Beretta CX4 Storm

The older models of the Beretta CX4 Storm had issues with brittle extractors. The extractor claw often broke off after quite a bit of use. This caused a lot of “failure to eject” (Fig 2) issues for the gun.


In such a case, regardless of whether the extractor has been worn off, or broken entirely, the solution is to replace the extractor entirely.

Beretta CX4 Storm Replacement Extractor
Beretta CX4 Storm Replacement Extractor

One can find a replacement extractor (Fig 3) for the Beretta CX4 Storm on the official Beretta website.

You may either choose to replace the extractor yourself or request the help of a qualified gunsmith for the installation.

4. Issues Regarding the Bolt:

There are several issues regarding the bolt. Sometimes the bolt locks back when there is still one round in the magazine. And other times the bolt won’t lock back after the last round has been shot.

All of these issues regarding the bolt can be traced back to the magazine. It could either be due to a damaged follower, worn-out mag spring, or an incompatible magazine.


There have been several known cases of the magazine follower getting damaged or worn and causing issues with the bolt. Or it could be an incompatible magazine or ammo.

Beretta CX4 Storm Magazine Follower Kit
Beretta CX4 Storm Magazine Follower Kit

You should check and evaluate the magazine follower to see whether it has been damaged or worn. If so, you could acquire a replacement magazine follower kit (Fig 4) online and equip it for your magazine.

However, if the issue persists, you could replace the magazine entirely. As incompatible magazines are also known to cause such issues.

5. Loose Magazines:

The Beretta CX4 Storm often showcases an issue with the magazine not locking into the gun. Leaving the magazine loose.

Hence the magazine falls out of the gun frequently. In the older models of the CX4 Storm, Beretta may have forgotten a small bend in the magazine catch spring. This seems to be causing the issue.


You need to disassemble the gun and locate the hole that the short end of the spring goes into. You will notice that it is actually molded on an angle.

It would appear that Beretta forgot to bend the spring at the same approximate angle, and hence it is not correctly seated into the hole.

All you need to do is make a slight adjustment bend to the spring. After which everything should work perfectly. It will also provide the gun with a very strong and smooth button as well. And the mag should now be held properly.

User Feedback on Beretta CX4 Storm

The Beretta CX4 Storm has quite a mixed reception among gun owners. While some do not like the exact looks and features of the CX4 Storm, others are head over heels for it.

The CX4 Storm faces severe jamming and failure to extract issues. This is mostly due to the brittle extractor claw that the CX4 Storm is known to house. One such instance can be seen on the AR15 forum.

Another user however mentioned on the official product page of the Beretta CX4 Storm that it is his all-time favorite gun.

The gun is also known to be quite incompatible with several aftermarket magazines. One user complained about one such issue on a separate thread on the AR15 forum.

Loose magazines are also an issue with quite a few of these. One such user demonstrates the cause of the issue and its solution on the official Beretta Forum.

Frequently Asked Questions (FAQs)

What is the effective firing range of the Beretta CX4 Storm?

Around 200 meters.

Which action system does the Beretta CX4 Storm have?

Straight blowback.

Can users mount tactical lighting devices on the Beretta CX4 Storm?


Does the Beretta CX4 Storm accept full-size pistol magazines?


Can additional rails be mounted to the Beretta CX4 Storm?

Yes. Additional rails can be mounted on the left, right, and bottom.


Although some do not have much affection for the Beretta CX4 Storm because of how it looks, that does not deter others from cherishing the gun.

However, if you are a proud owner and are faced with any of the above-mentioned Beretta CX4 Storm problems, this article can help you guide you through it entirely.

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1 comment
  1. I have three. Two in 9mm and one in 40SW. The Gen 2 9mm broke its recoil guide rod. The others have never had any issues. I am having one get the complete package from Sierra Papa to eliminate the plastic internals. Hopefully it is worth the cost.

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