Select Page

If you’re a proud owner of a Mossberg 590, then you know it’s crucial to keep it clean and well-maintained. Not only does this ensure its longevity, but it also guarantees optimal performance every time you use it.

In this article, I’ll guide you through the process of cleaning a Mossberg 590. We’ll start with the disassembly, move on to the actual cleaning, and finish with reassembly. Whether you’re a seasoned pro or a beginner, I’m confident you’ll find these instructions helpful.

So, strap in and get ready to learn the ins and outs of keeping your Mossberg 590 in tip-top shape. It’s easier than you might think, and with a little practice, you’ll be doing it like a pro in no time.

Disassembly of Mossberg 590

When it comes to disassembling your Mossberg 590, I’ll guide you through every step. You needn’t worry if you’re new to this; let’s walk through it together.

First off, ensure the gun is unloaded. Check it again, even if you’re sure. We can’t overstate the importance of safety. After you’ve double-checked, place the firearm on a clean, flat surface.

For the Mossberg 590, you’ll start with removing the magazine cap. Turn it counterclockwise until it comes off. After that, slide off the barrel carefully. Always remember to keep these parts in a place where they won’t get lost or damaged.

The next part is the slide assembly. You’ll find it easier than it sounds – gently press the shell stops which are located on either side of the gun’s interior. This action will allow the slide assembly to be moved forward.

Once done, the bolt slide should be visible. It’s the next part to go. It has a pin that needs to be punched out. Use a pin punch for this task. Be careful not to apply too much pressure; we don’t want to damage the pin or bolt slide.

The last parts to remove are the trigger assembly and the cartridge stop and interrupter. Push out the trigger housing pin, and the trigger assembly should drop out easily. The cartridge stop and interrupter will come out next.

By this stage, your Mossberg 590 should be fully disassembled. It’s not rocket science and with repeated practice, you’ll find the disassembling process becoming second nature. It’s key to remember each step and execute them with due diligence. In the following sections, I’ll proceed to discuss the cleaning process.

Gathering the Necessary Cleaning Supplies

Before I dive into the actual cleaning process, it’s essential to gather all the necessary supplies. The right tools make a world of difference and ensure a thorough, safe cleaning procedure. Let me walk you through what you’ll need.

First and foremost, a high-quality cleaning solvent is a must. The solvent helps break down gunk and deposits that may have built up in your weapon during usage. Look for a formula specifically designed for guns to protect your Mossberg 590’s finish while cleaning it effectively.

Secondly, you’ll need a gun oil or lubricant. Once you’ve cleaned the gun, a protective layer of oil or lubricant should be applied to guard against rust and aid in smooth operation. The lubricant must be designed for firearms, as standard ones might degrade the components.

Next on the list are cleaning rods and brushes. You’d require a sturdy yet flexible cleaning rod to reach all internal parts of the gun. Accompanying the rod, a set of brushes in various sizes will ensure no spot goes uncleaned.

Also consider adding patches and swabs into your cleaning kit. These are invaluable in applying the solvent and oil, as well as for removing any loose debris left after the initial cleaning.

A cleaning mat is another item I’d recommend. It may seem inconsequential, but a good mat can prevent any mess from ruining your workspace and will keep all your small parts securely in one place.

Lastly, you might want to have a set of nipper pliers handy. They’re great for handling small parts, like the firing pin or the cartridge interrupter.

In the following section, I’ll guide you step by step on how to use these supplies to clean your Mossberg 590. But remember, no matter how thorough your cleaning routine is, regular maintenance always holds the key for any firearm’s longevity and optimal performance. Now, let’s move on to the step-by-step cleaning process.

Cleaning the Barrel

The heart of your Mossberg 590 shotgun is the barrel. Its performance depends largely on how well it’s maintained. When it gets dirty, it can decrease the shotgun’s accuracy, reliability, and overall life span. Let’s dive into the steps needed to clean the barrel efficiently.

Bring out the cleaning rods and brushes. Ensure they’re in good condition. A shotgun cleaning brush will help to scrub away any grimy bits. Copper or nylon brushes will work best and it’s usually good practice to have a selection of both.

Start with the bore brush. This will help you clean the inside of the barrel. I typically begin from the breech end. Scrubbing back and forth a few times can help to loosen up the grimy buildup.

It’s time for the cleaning patches. Soak them in your solvent. Insert the solvent-soaked patch into the slotted end of your cleaning rod and run it through the shotgun barrel, again starting from the breech side. This process helps eliminate the dirt loosened by the bore brush.

Do not use too much force when cleaning. Gentle, persistent action gets the job done efficiently without causing any damage. It’s crucial not to rush this task or skip any steps.

Switch to dry patches, which are used to ensure there’s no remaining grime or residue. When the dry patch comes out clean once pushed through, it’s a sign you’ve done a good job cleaning.

After cleaning, a light coat of lubricating oil upholds the internal condition of the barrel. Lubrication plays an important role in minimizing friction that could wear down the inner walls of the barrel prematurely.

And that’s how to clean the barrel of a Mossberg 590 shotgun. The process might seem tedious and time-consuming, but remember it’s pivotal for the overall longevity and performance of your firearm. If you’re not confident about any step, seeking expert advice or watching a step-by-step video tutorial before diving in could be incredibly helpful for first-timers. As always, remember to strictly follow gun safety rules during this process.

Cleaning the Action and Receiver

After we’ve taken care of the barrel, it’s time to shift our focus to the action and receiver of your Mossberg 590. Just like the barrel, these parts also require a meticulous cleaning process to maintain optimal functionality.

Use your cleaning brush to dust off any easily seen residues or dirt. Head straight for the action, focusing on the places where the shells are fed and ejected. I’ve noticed small particles tend to congregate in these little nooks and crannies. So, detailed cleaning in these areas is essential.

Next on the line is the receiver. Now, make sure you do not submerge your receiver in solvent. That’s a common rookie mistake -submerging can make the oils pool in hard-to-reach areas or clog up essential components. Instead of soaking, it’s best to use a solvent-soaked swab or patch to apply the cleaner.

While scrubbing both the action and receiver, be gentle. You don’t want to damage the delicate parts. Once that’s complete, use dry patches to remove any potential leftover residue.

The application of lubricating oil comes next in this maintenance march. Just like we did with the barrel, apply a thin coat of lubricating oil to these parts. This will aid in not only their present function but also in their future maintenance. Avoid over-lubrication as it can attract dust and other particulates, which will lead to more cleaning required.

Of course, this is a task that needs repeating on a regular basis. Gun maintenance isn’t a one-time thing. Your Mossberg 590 needs your care to ensure its longevity and optimal performance. Regular cleaning can prevent potential functioning problems caused by buildup or grime and can ensure your firearm’s reliability.

If this is your first time dealing with this task, tutorials and expert assistance can offer more guidance. A gunsmith, especially, can teach you those little tricks that I’ve learned over the years – those that make the cleaning process more efficient. Gun safety should always be your priority during cleaning and maintenance.

And, as a friendly reminder — make sure your gun is not loaded before starting the cleaning process. Gun safety first, always.

Cleaning the Magazine Tube

Now that we’ve discussed how to properly clean the barrel, action, and receiver of your Mossberg 590, let’s move on to another vital part of the firearm: the magazine tube. Regular maintenance of the magazine tube is crucial for ensuring reliable ammunition loading and overall performance.

To clean the magazine tube, you’ll first need to safely unload the shotgun and ensure it’s not cocked. Once you’ve done that, it’s much simpler addressing the task at hand — the magazine tube.

Begin by removing the magazine cap and spring, followed by the shell stop and shell interrupter. These components play an important role in the Mossberg 590’s function, so be cautious while handling and cleaning them.

Next, immerse your cleaning brush in a high-quality cleaning solvent and start to work it inside the magazine tube. The solvent works to break down hardened gunpowder residue, dirt, and debris that have accumulated inside. Keep in mind to be gentle and thorough, trying to avoid unnecessary force that could potentially harm the tube’s interior.

Follow this process by running a solvent-soaked swab or patch through the tube. The gun-cleaning swab has a remarkable sponge-like ability, easily lapping up excess dirt and oils. For optimal cleaning, it’s recommended to run dry patches afterward to ensure no solvent residue remains.

After you’ve ensured the magazine tube is thoroughly clean, apply a light layer of gun lubricating oil. That’s an imperative step, by maintaining a lubricated — yet not overly lubricated — tube, you’re ensuring your Mossberg 590 functions smoothly and efficiently.

Remember what I’ve shared about cleaning other parts of the firearm. Regular cleaning of the magazine tube is no different in its importance. It’s a pivotal part of your gun that contributes to its longevity and reliable performance.

Let’s also keep in mind the critical point – gun safety rules should always be adhered to during the cleaning process. If you’re uncertain about any step, consider seeking expert advice or tutorial videos.

We’re not rushing to the finish line when cleaning our Mossberg 590; instead, we want to ensure that we’re covering all our bases meticulously. Stay tuned as we move on to our next topic.

Lubricating the Parts

Now that we’ve delved into cleaning the Mossberg 590, it’s time to touch on an equally vital aspect – lubrication. Proper lubrication is a key ingredient to long-lasting firearm performance. Not only does it fend off undue wear and tear, but it also guarantees smooth operation.

Perhaps you might wonder, “What are the crucial parts for lubrication?” You won’t go wrong if you focus on barrel, bolt, action bars, magazine tube, and extractor claw.

Lubricating is quite simple. Begin by applying small drops of gun oil to the parts in question. An oil applicator will definitely make this process much easier. Always go for a high-quality lubricant. It’ll not only last longer but it’ll effectively combat friction better.

Now let’s delve into the specifics:

For the barrel, apply the oil on your cleaning rod’s attachment brush and run it through the barrel several times. The oil will coat the interior evenly, preventing rust and providing smooth conditions for the shot pellet load.

For the bolt, dab some oil on your swab and pass it over all surfaces. Don’t forget the firing pin channel and bolt face as these regions are very prone to rust. It’s crucial not to use excessive oil as it can attract dirt and grime.

Next, the action bars. These require a light coating of oil. Apply just enough oil to make them glossy. Too much oil can lead to sluggish action, and you surely wouldn’t want that.

The magazine tube also needs to be lightly lubricated. Just like the action bars, a glossy finish is a good indicator that you’ve applied an adequate amount of oil.

Finally, we’ll look at the extractor claw. A drop or two of oil will suffice. Remember, the aim is to reduce friction and not to douse.

During this entire process, endeavour to use your nitrile gloves, keeping safety at the forefront. And there you have it, the ins and outs of lubricating your Mossberg 590 shotgun. You’re all set to move onto the next maintenance task.

Reassembling the Mossberg 590

As we press forward in this process, it’s time to set our sights on the reassembly of the Mossberg 590. Once the necessary elements have been thoroughly cleaned and lubricated, the gun’s longevity and optimal functionality is heavily dependent on reassembling it properly. Let’s break this down into a step-by-step guide.

To begin with, I’ll slide the barrel back into the receiver, where it slots in effortlessly. The magazine tube will thus readjust itself and lock the barrel firmly into place, ensuring everything is secure.

Next, it’s the reinsertion of the bolt assembly. Take note in aligning the bolt and the carrier correctly as it’s a pivotal point in guaranteeing smooth firing and ejection operation. Now, nest the bolt into the action slide. Wiggle it gently until it lies perfectly in place within the receiver.

The following step involves reinstating the trigger housing. Its importance can’t be understated, as the trigger housing plays a key role in the Mossberg 590’s operation. I’ll make certain that the trigger guard is properly re-inserted into the receiver. Using a heavy-duty punch, I’ll carefully drive the pins back into place.

Reassembling the Mossberg 590 also requires handling the silent, no-fuss installation of the safety button. Here, the proper placement of parts is crucial. I’ll place the safety button back into the hole in the receiver, and with a bit of pressure, it’ll slot right in.

Finally, it’s time to snap on the pump handle. Easy to handle, I’ll slide it onto the action bars until it clicks into place. Then, by testing the pump-action function, I can ensure that it operates smoothly.

I want to underline that it’s key not to rush this process. Patience and an eye for detail here ensures the Mossberg 590’s lifeline. It’s the accurate and steadfast reassembly that keeps the shotgun at its high-functioning best. With these points in mind, the Mossberg 590 is once again good to go and ready for action.


So there you have it. Cleaning your Mossberg 590 isn’t as daunting as it may seem. It’s all about breaking it down, giving it a good clean and lube, then putting it back together with care. Remember, attention to detail during reassembly is crucial for maintaining the shotgun’s performance. Don’t rush the process. Take your time and ensure each part is correctly installed. Your Mossberg 590 will thank you for it with years of reliable service. Keep up with regular maintenance, and you’ll find your shotgun stays in top shape for shooting sessions to come.

Frequently Asked Questions

1. Why is it important to properly reassemble my Mossberg 590 shotgun after cleaning and lubrication?

It is important to properly reassemble your Mossberg 590 shotgun after cleaning and lubrication to ensure its longevity and optimal functionality. Incorrect reassembly can lead to malfunctions or damage to the gun.

2. What are the steps to reassemble a Mossberg 590 shotgun?

The steps to reassemble a Mossberg 590 shotgun include sliding the barrel back into the receiver, reinserting the bolt assembly, reinstating the trigger housing, installing the safety button, and snapping on the pump handle.

3. What should I keep in mind during the reassembly process?

During the reassembly process, it is important to have patience and pay attention to detail. This helps ensure that each component is properly aligned and secured, maintaining the high-functioning performance of the shotgun.