Mossberg MC2SC Problems And Their Solutions

The Mossberg MC2SC is a micro-compact 9mm pistol with a 3.4-inch barrel and comes with two magazines. This compact and reliable handgun is known for its accurate shooting and comfortable grip, making it a favorite among gun enthusiasts.

However, like any firearm, the Mossberg MC2SC may encounter some problems that can affect its performance. In this article, we will discuss some of the common issues that you may encounter while using this pistol and how to solve them.

Some of the most common problems with Mossberg MC2SC reported by the shooters are, Not returning to battery, Failure To Feed, Failure To Eject, Trigger Sear Problem, Light Primer Strike and Slide Problem.

Quick Overview of Problems And Solutions

Problem Solution
Failure To Feed Use high quality Ammo
Failure To Eject Clean the chamber and extractor
Trigger Sear Problem Clean the trigger mechanism
Not Returning To Battery switch to quality ammo and clean the gun
Slide Issue lubricate the slide and slide rails.
Light Primer Strike change the firing pin

Common Mossberg MC2SC Problems And Their Solutions

1. Not Returning to Battery

You’re on the range, ready to fire off some rounds with your trusty Mossberg MC2SC. You load in a fresh magazine, rack the slide, and pull the trigger. But instead of hearing that satisfying bang, you hear…nothing.

The slide didn’t go fully into battery, meaning it didn’t close all the way and lock into place. This is not only frustrating, but it can also be dangerous if you don’t realize it and try to fire again.

But what causes this issue, and how can you fix it? Let’s take a look.

Possible Causes

There are a few potential reasons why your Mossberg MC2SC might not be returning to battery:

  • Dirty or gunked up slide or chamber: If your gun isn’t properly cleaned and lubricated, debris and gunk can build up in the slide and chamber, causing malfunctions.
  • Weak recoil spring: As you fire more rounds through your gun, the recoil spring can become worn down, leading to issues with returning to battery.
  • Extractor issue: The extractor is responsible for pulling the spent casing out of the chamber after firing. If it’s damaged or dirty, it may not be able to properly eject the casing, causing issues with returning to battery.


  • Clean and lubricate your gun: This is always a good first step when experiencing any firearm issues. Make sure to thoroughly clean and lubricate the slide and chamber of your gun, as well as the recoil spring and extractor.
  • Replace the recoil spring: If your spring is worn down, it may need to be replaced. Check with a gunsmith or your manufacturer for instructions on how to do this properly.
  • Inspect and clean the extractor: Take a close look at your extractor to make sure it’s not damaged or dirty. If necessary, use a soft brush and some gun cleaner to clean it out.

2. Failure To Feed

One common problem that you may encounter with a Mossberg MC2SC is the failure to feed. This can be frustrating, especially when using your firearm for self-defense or competition purposes. Luckily, this issue can sometimes be easily fixed with proper troubleshooting.

If you find that your MC2SC is not feeding properly, the first thing to check is the magazine. Make sure it is properly loaded and inserted into the gun. If the problem persists, try using a different magazine to see if that solves the issue.

If changing the magazine does not help, the next step is to check for any obstructions in the chamber or barrel. Clear any debris or fouling that may be causing the feed failure. It is also important to regularly clean and maintain your firearm to prevent any build-up that could potentially cause feeding issues.

Another potential solution is to try using higher quality ammunition. The MC2SC is designed to work best with factory-made, brass-cased ammo. Using cheap or low-quality ammo can sometimes lead to feeding problems.

3. Failure To Eject

One common issue that many gun owners experience with the Mossberg MC2SC is failure to eject. This can be frustrating and cause delays in shooting, which defeats the purpose of having a reliable firearm for protection.

Possible Causes:

  • Dirty or damaged extractor
  • Weak recoil spring
  • Faulty ammunition
  • Improper grip or stance


To prevent failure to eject, it is important to keep your gun clean and well-maintained. Regularly inspect and clean the extractor, as well as replace any damaged parts. You should also check your recoil spring for wear or damage and replace if necessary.

Additionally, ensure that you are using high-quality ammunition suitable for your firearm. Finally, make sure to have a proper grip and stance when shooting to prevent issues with ejection.

4. Trigger Sear Problem

One notable issue that some owners have encountered with the Mossberg MC2SC is related to the trigger sear. This component is responsible for engaging and releasing the hammer when pulling the trigger, allowing the firearm to fire.

If you notice that your trigger feels gritty or has a noticeable hitch when pulling it, there may be an issue with the sear. This can be caused by debris or dirt build-up, or even an improperly installed sear.

To solve this problem, you can try cleaning the trigger mechanism with a solvent and lubricant to ensure smooth movement. However, if the issue persists, it is recommended to seek the assistance of a certified gunsmith for proper diagnosis and repair.

5. Light Primer Strike

As a new shooter, you might encounter a light primer strike while using your Mossberg MC2SC. This is when the firing pin doesn’t strike hard enough to ignite the cartridge’s primer, resulting in a misfire. Don’t worry; this is a common issue that can be easily fixed.

Possible Causes

There are a few possible causes for light primer strikes in your Mossberg MC2SC. One possible cause is a worn firing pin, which can be replaced with a new one to solve the issue. Another possible cause could be debris or dirt buildup around the firing pin area, hindering its movement and reducing its impact.


If you’re experiencing light primer strikes with your Mossberg MC2SC, try these solutions to fix the issue:

  • Clean the firing pin area: Use a small cleaning brush and some gun oil to clean any debris or dirt around the firing pin. This will help ensure smooth movement and proper impact.
  • Replace the firing pin: If your firing pin is worn, it’s time for a replacement. You can purchase a new one from your local gun shop or online and easily replace it yourself by following the manual.
  • Check your ammunition: Sometimes, light primer strikes can be caused by faulty or old ammunition. Try using a different brand or newer ammo to see if the issue persists.
  • Seek professional help: If none of the solutions above work, it’s best to seek the assistance of a professional gunsmith. They will be able to diagnose and fix any underlying issues causing the light primer strikes.

6. Slide Problem

1. Slide Sticking or Jamming

You might have experienced that your slide gets stuck or jammed while operating your Mossberg MC2SC. This could happen due to various reasons such as a dirty slide, improper lubrication, or damaged slide rails.

To solve this issue, you can try cleaning your gun and slide rails thoroughly with a gun cleaning solution. Make sure to remove any dirt, debris, or build-up from the slide rails using a brush or cloth. After cleaning, apply an appropriate amount of gun lubricant to the slide rails for smooth functioning.

If the issue persists, it could be due to damaged slide rails. In this case, it is recommended to seek professional help and get the damaged part replaced.

2. Slide Not Locking Back

Another common problem with Mossberg MC2SC is that the slide does not lock back after firing the last round. This could be due to several reasons such as an improper grip, weak magazine spring, or damaged slide stop.

To solve this issue, try adjusting your grip and hold the gun firmly while shooting. You can also check for any obstructions or debris in the magazine that might be causing feeding issues.

If the problem still occurs, it could be due to a weak magazine spring or damaged slide stop. In this case, you can try replacing the magazine with a new one and see if the problem persists. If it does, then it is best to consult a professional gunsmith for further assistance.

3. Slide Dragging or Scratching

Sometimes you might notice that your Mossberg MC2SC slide is dragging or scratching on the frame while operating. This could be due to a damaged recoil spring or guide rod.

To solve this issue, you can try replacing the recoil spring and guide rod with new ones. Make sure to use high-quality parts and consult a professional if needed.

Frequently Asked Questions(FAQs)

Is the MC2sc reliable?
Yes, the MC2sc is such an accurate micro-compact pistol, offering reliability and precision like no other.
How much Does Mossberg 9mm MC2 Cost?
It cost you around $490+
Does the Mossberg MC2c have a safety?
Yes, the Mossberg MC2c does have a safety feature. It is located on the left side of the frame, making it easily accessible with your thumb.

What is the difference between Mossberg MC2sc and MC2c?

One of the main differences between the Mossberg MC2sc and MC2c is their size. The MC2sc is a subcompact model, while the MC2c is a compact model. This means that the MC2sc is smaller and lighter than the MC2c, making it more suitable for concealed carry purposes.

The MC2c, on the other hand, offers a larger grip and more rounds in its magazine, making it ideal for those looking for a full-size capacity in a compact frame.


Congratulations on making it to the end of this guide! By now, you should have a better understanding of the Mossberg MC2SC and how to troubleshoot common problems that may arise. We hope that you found this guide informative and helpful.

Remember, always handle your firearm with care and follow all safety precautions. If you are ever unsure about how to properly use or maintain your firearm, don’t hesitate to consult the owner’s manual or seek assistance from a trained professional.

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