Hey there, gun enthusiasts! Today, we're diving deep into the Mossberg 940 Pro Tactical, a shotgun that's become a favorite for many. But, like any piece of machinery, it's not without its quirks. We're going to break down some common Mossberg 940 Pro Tactical problems that you might encounter and, more importantly, how to fix them. Buckle up, and let's get into it!

Understanding Your Mossberg 940 Pro Tactical

Before we jump into troubleshooting, let's get a quick refresher. The Mossberg 940 Pro Tactical is a semi-automatic shotgun designed for tactical and defensive purposes. It’s known for its reliability, speed, and ease of use. It features a gas operating system, which helps to reduce felt recoil and allows for faster follow-up shots. It also boasts a host of features like an oversized bolt handle, a beveled loading port, and a drilled and tapped receiver for optics mounting, making it highly customizable. Understanding these core components is key to understanding potential problems. The 940 Pro Tactical is built to withstand rigorous use, but like all firearms, it requires proper maintenance to ensure optimal performance. That means regular cleaning, lubrication, and inspection of all parts. When it comes to the Mossberg 940 Pro Tactical, you're looking at a reliable piece of equipment, but some users have reported issues. The most frequent issues are usually related to cycling problems, failure to feed, or ejection issues. These problems can often be traced back to a few key areas: the gas system, the ammunition used, and the overall maintenance of the firearm. It's important to understand the mechanics and parts of your shotgun so that you can diagnose and fix any problems that come up. Proper maintenance includes regular cleaning, inspection, and lubrication to keep your shotgun in top shape. The Mossberg 940 Pro Tactical is an excellent shotgun when it's functioning properly. But like any semi-automatic shotgun, you will have to be ready to deal with the inevitable problems that could arise during usage. Taking care of your 940 Pro Tactical requires a proactive approach. Understanding how the shotgun works, knowing what parts are critical for smooth operation, and adopting a regular maintenance schedule can go a long way in ensuring your shotgun is ready when you need it.

Cycling and Feeding Issues: The Most Common Mossberg 940 Pro Tactical Problems

Alright, let's talk about the big one: cycling and feeding issues. This is probably the most common complaint among Mossberg 940 Pro Tactical owners. If your shotgun isn't cycling rounds properly, it can be incredibly frustrating, and in a defensive situation, it could be a real problem. So, what's causing it? Well, there are several potential culprits:

• Ammunition: The ammunition you use plays a significant role. Some shotguns are picky eaters, and the 940 Pro Tactical is no exception. Low-brass shells or those with weak powder charges might not generate enough energy to cycle the action fully. Always use quality ammunition designed for semi-automatic shotguns. Experiment with different brands and loads to find what works best for your gun. Avoid using reloaded shells, especially if you're not sure about their quality.
• Gas System: The gas system is the heart of the semi-automatic action. If it's dirty, clogged, or improperly lubricated, it can mess up the cycling process. Check the gas piston, gas cylinder, and the gas ports in the barrel for any buildup of carbon or debris. Clean them thoroughly with a good gun cleaner. Make sure the gas piston moves freely within the gas cylinder. Proper lubrication is also essential.
• Cleaning and Maintenance: This can cause the Mossberg 940 Pro Tactical problems. A dirty gun is a problem. The 940 Pro Tactical needs regular cleaning and lubrication. Carbon buildup in the chamber, barrel, or action can impede the smooth operation of the gun. Follow the manufacturer's instructions for cleaning. Pay special attention to the bolt, extractor, and ejector. Use a quality gun oil to lubricate moving parts, but avoid over-lubricating, as this can attract dirt and debris.
• Extractor Problems: The extractor claw is responsible for pulling the spent shell casing out of the chamber. If the extractor is worn, damaged, or has a weak spring, it might not be able to grip the shell firmly. This can cause failures to extract. Inspect the extractor regularly for any signs of wear or damage. You can find replacement extractors and springs online or at most gun stores. Replacing the extractor and spring is usually a simple process.
• Ejector Problems: The ejector is the part that kicks the spent shell out of the gun. If the ejector is damaged, broken, or not properly positioned, the empty shell will not eject properly, leading to a jam. Check the ejector for any damage or obstructions. If the ejector is damaged, replacing it is necessary. If the ejector is simply dirty, try cleaning it thoroughly.
• Other Potential Causes: Other causes might include a weak recoil spring, a dirty or damaged magazine tube, or even a damaged bolt. If you've addressed the issues mentioned above and you are still experiencing problems, then consider these as well.

Troubleshooting these issues often involves a process of elimination. Start with the simplest checks and work your way up. Regular cleaning and maintenance are essential to preventing these problems. Always make sure to use quality ammunition, and inspect your gun regularly for signs of wear or damage.

Failure to Eject: Mossberg 940 Pro Tactical Issues

Another common Mossberg 940 Pro Tactical issue is failure to eject. This is when the spent shell casing doesn't leave the gun after firing. This can lead to a jam, rendering your shotgun useless until you clear it. Here’s what might be happening:

• Extractors: The extractor's job is to grab the rim of the shell casing and pull it out of the chamber. If the extractor is worn, dirty, or damaged, it might not be able to get a good grip on the shell. As a result, the shell stays stuck in the chamber. Inspect the extractor regularly for any signs of wear or damage. If the extractor is the issue, you may need to replace the extractor or spring.
• Ejector Issues: The ejector is responsible for kicking the spent shell out of the gun once the extractor has pulled it out. If the ejector is broken, damaged, or has a weak spring, it might not be able to do its job effectively. The ejector must be in good working condition. Inspect the ejector for any damage or obstructions. If the ejector is damaged, replacing it is necessary.
• Chamber Issues: A dirty or rusty chamber can make it difficult for the shell casing to slide out. Make sure to clean and lubricate the chamber regularly. Use a chamber brush to remove any buildup of debris or corrosion.
• Ammunition: Again, the ammunition you use plays a role. Shells with a weak charge or those that don't expand properly can cause ejection problems. Try using different brands and loads of ammunition.
• Gas System Issues: A dirty gas system can also cause ejection problems. If the gas system is not functioning correctly, it can affect the cycling of the action and lead to failures to eject. Clean the gas system regularly. Make sure to remove any carbon buildup or debris.
• Recoil Spring Issues: The recoil spring is responsible for returning the bolt to battery after firing. A weak or worn recoil spring might not generate enough force to eject the shell casing properly. Inspect the recoil spring for any signs of wear or damage. If the recoil spring is the problem, you may need to replace it.

Other Potential Problems and Solutions for Your Mossberg 940 Pro Tactical

Beyond cycling and ejection, there are a few other Mossberg 940 Pro Tactical problems you might encounter:

• Failure to Feed: This is where a round doesn't make it from the magazine tube to the chamber. Check the magazine tube for any obstructions. Make sure the follower is moving freely. Inspect the shell stop and shell latch for any damage. Check the magazine spring and replace it if necessary.
• Loose Screws and Parts: Over time, the constant vibration of shooting can cause screws and other parts to loosen. Regularly inspect your shotgun for loose screws, especially around the receiver, barrel, and forend. Tighten any loose screws. If screws are frequently coming loose, consider using thread locker.
• Trigger Issues: While less common, trigger problems can occur. This could be anything from a gritty trigger pull to the trigger not resetting properly. A little cleaning and lubrication can usually solve this. If the trigger is still problematic, consult a gunsmith.
• Rust and Corrosion: Rust and corrosion can develop if your shotgun isn't properly cared for. Always clean and lubricate your gun after each use, especially if you've been in wet conditions. Store your shotgun in a dry environment.

Maintenance Tips to Avoid Mossberg 940 Pro Tactical Problems

Prevention is key, guys! Here are some crucial maintenance tips to keep your Mossberg 940 Pro Tactical running smoothly:

• Regular Cleaning: This is a must. Clean your shotgun after every shooting session. This removes the built-up carbon and other residues that lead to malfunctions.
• Proper Lubrication: Use a quality gun oil to lubricate the moving parts of your shotgun. Avoid over-lubricating, as this can attract dirt and debris.
• Inspect Regularly: Before and after each use, inspect your shotgun for any signs of wear, damage, or loose parts. Check the extractor, ejector, gas system, and other critical components.
• Use Quality Ammunition: Stick to reputable brands and loads that are designed for semi-automatic shotguns.
• Follow the Manual: The Mossberg 940 Pro Tactical comes with an owner's manual. Read it, and follow the manufacturer's instructions for cleaning, maintenance, and troubleshooting.
• Professional Help: Don't hesitate to take your shotgun to a qualified gunsmith if you're not comfortable with making repairs yourself, or if you're experiencing persistent problems that you can't resolve.

Final Thoughts: Keeping Your 940 Pro Tactical in Tip-Top Shape

So there you have it, folks! We've covered some common Mossberg 940 Pro Tactical problems and how to tackle them. By understanding your gun, practicing regular maintenance, and using quality ammunition, you can keep your 940 Pro Tactical running reliably for years to come. Remember, safety first! Always handle firearms responsibly and follow all safety precautions. If you're having persistent problems with your shotgun, it’s always best to consult a qualified gunsmith. Stay safe, and happy shooting!