Best Mossberg 500 Trigger Assembly Upgrades – 2019 Review

Are you looking for the best Mossberg 500 trigger assembly? If you are, you’ve come to the right place, because we have taken the liberty of tracking down the five best replacement parts for a Mossberg 500 trigger.

These are considered the best in various categories and all stand head and shoulders over the cheap and low-quality trigger assemblies and parts that will fall apart on you or fail at any given time.

Before choosing a trigger assembly or parts for your own Mossberg 500 shotgun, you’ll need to know how you can choose the one best for your needs and preferences. At the same time, you’ll need to know if the trigger assembly and parts you need will fit your budget.

Comparison of the Best Mossberg 500 Trigger Assembly Upgrades

Product

Our Rating

Price

Mossberg - Trigger Assembly

Best Overall

Mossberg - Trigger Housing Pin Retainer Spring

Best Retainer Spring

Mossberg - Trigger Stop

Best Trigger Stop

Mossberg - Trigger Housing Assembly

Mossberg - Trigger Pin

Mossberg 500 Trigger Components 

To familiarize yourself with how the Mossberg 500 trigger assembly works, you’ll need to know the ins and outs of the components. You need to know how to identify each part as you are putting the trigger together and installing it on your shotgun. If you have an existing Mossberg 500 and want to know the anatomy of the trigger system itself, you can do so by disassembling the trigger. The instructions to disassemble and reassemble will be located toward the end of this article.

With that in mind, here are the components that you need to know:

Action Lock Disconnector Spring 

This aids in connecting the action lock to the disconnector. Once installed, it should add some tension to the action arm itself.

Action Lock Hammer Spring 

This aids in connecting the action lock with the hammer. Once installed, it will allow some tension on the hammer pull.

Action Lock Lever 

This part is located on the left-hand side of the trigger housing. It allows the action to be unlocked and open for inspection.

Connector 

Also known as a safety connector. This is to allow the safety on your shotgun to function properly.

Disconnector 

Disengages the connection between the trigger and the sear each time a shot is fired. Also performs as a safety function.

Hammer

Initiates the fire sequence on a shotgun. This works once the sear releases it.

Hammer Pin 

Holds the hammer together. When assembled, the hammer will move freely.

Mainspring

This allows for the hammer to move. Without it, the hammer will not move and in turn, will not allow the gun to fire.

Mainspring Guide 

This is a post that is held by the mainspring. This is the long part of all the mainspring parts.

Mainspring Plunger 

This also holds the mainspring in place. Located on the end of the mainspring guide.

Mossberg Mainspring Plunger Mossberg 500 (Source)

Mainspring Retainer Pin 

Secures and holds the mainspring together. Also holds the mainspring guide in place.

Sear 

This holds the hammer, trigger, and the hammer striker back. Associated with the trigger pull.

Sear/Action Lock Pin 

A pin which holds the sear parts in place. Also holds the action lock.

Sear Spring 

This holds the sear together. Located on the rear end of the sear.

Trigger 

This is used to initiate the shot. You can pull it back, allowing the hammer to strike the primer.

Trigger Assembly 

This assembly includes the trigger and the housing that holds all the parts. These parts include the trigger pin, trigger return spring, and trigger stop.

Trigger Pin 

A pin used to hold the trigger in place. Also holds the other parts in the trigger assembly together.

Trigger Return Spring 

This delivers a quick and positive reset to the trigger. This is one of the parts that aids in the trigger’s movement.

Trigger Stop 

This is used to stop the trigger from going any farther. Located on the top part of the trigger assembly.

Characteristics of a Great Trigger Assembly

What separates a great trigger assembly from one that is not so great? That's what you'll find out in this section. It's important to know some of the features and functions that go into a great trigger. These are some things that low-quality, cheap trigger assemblies fall short of. To better know what to look for, it's always good to trust the past buyers who had to rely on these characteristics in finding a good trigger assembly. Here's what you should look for:

Material

One of the main things to know about the trigger assembly is the type of materials the assembly and parts are made out of. The materials will typically be high-quality like steel or aluminum for the purpose of greater durability. Some triggers on these assemblies can also be made from polymer or plastic.

Parts Of The Assembly

Remember, the trigger is not the only part of the trigger assembly itself. It’s important to know what is included in the trigger assembly. These include the springs and pins that obviously need to hold the trigger assembly and parts together. A good trigger assembly kit should have these included as well as the other parts like the hammer, sear, action lock, and so on.

Installation Process

Most of the trigger assemblies will often be drop-ins. This means that you won’t have to rely on the services of a professional gunsmith to install these on your Mossberg 500. Furthermore, you won’t need to make any permanent alterations to your shotgun prior to installing a trigger assembly.

Quick Take - Mossberg Trigger Assembly Upgrades

Review of the Mossberg Trigger Assembly Upgrades

Below are five of the best Mossberg 500 trigger assemblies currently on the market as of this writing. In order to find the best one for your own shotgun, you’ll need to take a look at the unique features of each of these triggers carefully.

It is also important to take into consideration the pros and cons of each assembly, so you’ll know what to possibly expect when you get down to a final decision. Now, let’s begin our list of five trigger assemblies to fit your Mossberg 500:

Pros

  • Very Easy to Install
  • Little to No Creep Among Users.
  • Users Have Experienced No Issues After 200+ Rounds Fired

Cons

  • Some Have Reported the Fit Being a Little Too Tight

We begin our list of trigger assemblies with none other than the Mossberg factory trigger assembly. This is a factory replacement trigger that is designed to stand the test of time and heavy usage.

Most importantly, this is a trigger that can handle the most hardcore usage possible. This has an aluminum housing trigger guard that will make this trigger stronger. At the same time, the rest of the parts will function and last for many years thanks to this aluminum housing and the materials that each part is made from.

Since this is manufactured by Mossberg themselves, it's guaranteed to fit your Mossberg 500 or 590 without a single issue. And installation is a breeze, so you won't need to rely on a gunsmith to install the trigger for you. To top it off, this has a black matte finish that will blend in well with the Mossberg shotgun that you use (especially the Mossberg 500).

Bottom Line

Of course, this should come as no surprise regarding this trigger and why it’s the best of the best. For a factory replacement trigger, this stands head and shoulders over an underperforming and disappointing trigger. It’s also no surprise that it will fit with almost every Mossberg 500 known to man. After all, it is made right from the Mossberg factory.

This is a trigger that can take on any usage, no matter how heavy-duty it may be. If you’re looking for a factory replacement that will last you a long time, this Mossberg trigger could be the one you’ll buy and keep for a long period of time.

Pros

  • Easy to Install
  • Fits all Mossberg Shotguns
  • Pulls Smooth Without Any Creep

Cons

  • None

Next on the docket is the Trigger Housing Pin Retainer Spring by Mossberg. This is also a factory replacement that is designed to fit all Mossberg 500 and 590 shotguns.

If your current trigger housing pin retainer spring is not working very well or if yours is missing from the trigger itself, you can always get one of these in order for your trigger to work much smoother than ever. This is a much-needed accessory to have if you want your trigger to have a nice smooth pull with no creep to speak of.

Bottom Line

If you’re looking for a high-quality factory replacement part, then nine times out of ten you’ll end up right at the source. In this case, the Mossberg brand itself creates factory replacement parts that are guaranteed to fit any shotgun that they make.

It might be a lot better than finding a trigger assembly made by a manufacturer outside of the Mossberg name. In the event that you need to replace your trigger, don’t forget to add on a part like this to ensure that the overall trigger function is top-notch for as long as possible.

Best Trigger Stop:
Mossberg - Trigger Stop

Pros

  • Super Durable
  • Functions Well for a Replacement Part
  • Will Fit Almost All Mossberg 500 Shotguns

Cons

  • None

Obviously, there are some trigger assembly accessories that are attainable without having to drain your bank account. In this case, the trigger stop from Mossberg is the part that we believe is the best trigger assembly part for the money.

At risk of being repetitive, we will once again say that this will fit with most Mossberg 500 and 590 triggers. If you have a trigger stop that is not working or if you need to replace some parts to ensure that your trigger continues to work, you’ll want something like a factory replacement trigger stop like the Mossberg.

This is designed to stop the trigger from going too far as you are pulling it, while getting a shot off. Without it, it may not function properly.

Bottom Line

While we don’t have much to say about this part of a trigger assembly, this is something that is obviously required in order for your trigger to work properly. A good trigger stop is useful, especially when you have a trigger that will be light in pull weight.

If you need a good replacement part like a trigger stop, there is nothing better you can find, other than one from the Mossberg factory itself.

Pros

  • Drops In as Advertised
  • Made From Polymer, Which is a Durable Kind of Material
  • Comes With the Needed Pins and Springs for Easy Assembly

Cons

  • Some Users Wish the Trigger Was Metal Rather Than Plastic or Polymer

Next, we’ll be looking at Mossberg’s Trigger Housing Assembly. This is a trigger assembly that has all kinds of parts included with it. This includes the trigger itself, the bolt release, and the springs and pins that go along with it.

This is a factory replacement trigger that will fit your Mossberg 500 or 590 shotgun with the greatest of ease. Since it’s from the Mossberg factory, it’s a guarantee that you’ll be able to install this without an issue. Plus, this is a drop-in trigger assembly. Of course, this means that the installation process itself will be simple. Even better, you don’t need any permanent alterations done to your shotgun before installing this.

Bottom Line

This trigger housing assembly is a convenience to have. If you choose this, all you have to do is install it in minutes and you’re good to go. If you want a full trigger assembly and don’t want to waste time or money looking for replacement parts, then you should possibly consider getting an entire trigger assembly like this for your Mossberg 500.

Pros

  • Easy to Install
  • Very Durable Replacement Part
  • Designed to Last You a Long Time

Cons

  • None

Finally, we have the Mossberg trigger pin to look at. This is a key part of the assembly because it holds the trigger in place. Without it, it’s pretty much useless. If you lost your trigger pin during disassembly or any other circumstances that may have resulted in losing your trigger pin, Mossberg obviously has a replacement part for it.

In order to install this, you obviously need to disassemble the trigger itself in order to place it in the respective socket. This is made from high-quality material, ensuring its long life and functionality. The goal here is to make sure that your Mossberg trigger will last for a long period of time without ever having to replace any parts.

If you’re missing a trigger pin or have one that’s badly damaged, you’d be lost without it. So you’ll need a factory replacement trigger pin to help get the job done so your Mossberg 500 shotgun can fire properly once again.

Bottom Line

Of course, a good trigger pin will last you a while, as long as you take good care of the trigger itself along with the parts that make it work. Once in a while, you should disassemble the trigger itself so you can clean out any gunk or anything else.

There will be times when you'll lose some parts due to forgetfulness. Having said that, in case you need a replacement trigger pin, you can always get a factory replacement through Mossberg themselves.

Cautious Considerations Before Buying

Before you buy a trigger assembly, it is important to know some of the downsides of purchasing one and having it shipped to you. It is important that you know these for safety’s sake. Here are some things that you need to know about:

Missing Parts

Some buyers have had to return trigger assemblies to the vendor or manufacturer due to the fact that there have been some missing parts. It is important that even after you receive a new trigger assembly, you should disassemble it to ensure that you have every pin and spring in place. If you have an assembly kit, make sure that all springs, pins, and parts are present and accounted for.

Making Sure It Fits

While most of the triggers will be drop-ins, the installation is expected to be easy. However, there may be some parts that need some filing to ensure that they fit perfectly. If you are struggling to fit your trigger assembly on your Mossberg shotgun, please consult a gunsmith near you so they can determine what the issue might be.

How to Disassemble and Reassemble a Mossberg 500 Trigger Group

The first thing that has to be done is to make sure you have protective eyewear. That’s because the parts that are housed in the trigger assembly will freely fall out. At the same time, they have the potential to hit you in the face or eyes.

So it is important to wear the appropriate protection while disassembling and even reassembling a Mossberg trigger group. With that said, let’s begin with the disassembly process. As always, be sure that your Mossberg 500 is unloaded completely. Now, let’s begin with the steps:

Disassembly

  1. Take the pressure off the hammer by squeezing the trigger and easing it back. Don’t slam it forward.
  2. Take out the trigger pin itself. Using a tool, pop it out from the mainspring.
  3. Once the pin is out, you should be able to remove the mainspring. Keep your finger over the hole where the mainspring pin is located and push it out with your tool. There’s a flared part of the mainspring pin that sticks out on the other side. Push your tool so the flared part itself comes farther out. The mainspring should easily fall out, as well as the plunger (keep these parts in a safe place. Do not lose them).
  4. Take out the pin that holds your hammer. At this point, the hammer should swing freely prior to disconnecting the pin.
  5. Next, take out the action lock. Push out the action lock pin and the springs associated with it should fall out. Don’t force it out.
  6. Finally, go to the sear. Make note of its orientation. There is a spring located inside the sear (known as the sear spring). Push it out using your tool. Remember, this is a spring that will be difficult to replace if you do not have the proper tool to help you replace it back in the sear itself.
  7. Next, you’ll need to clean out the trigger housing thoroughly if needed. Any dirt, goop, or other foreign substances will need to be cleaned out. This will also be a good opportunity to repair or even replace any parts that may be damaged.

Reassembly

To note, this is one of the most challenging tasks when it comes to repairing a Mossberg 500 trigger. Please pay close attention to these steps as you are reassembling a trigger group. With that said, here are the steps you need to take:

  1. Take the sear in one hand and the spring in the other. Make sure that the notch where the spring goes in is facing left or right (it will depend on how you hold it). Push the pin part way in so it leaves a gap. The long piece of the spring needs to go towards the wall. The hook or notch is going to go on the back side of the sear, pushing it down toward the bottom of the trigger group. This will take some moving and finagling. Don’t crush it or anything forceful.
  2. Now, take your action arm. This will be easy to slip back into the housing. Slip it through the side hole and it should sit properly. Jiggle it a bit to ensure that it is in the right place. Replace the action lever hammer spring. Take the action lock pin and take it through the hole while holding down the action lever hammer spring itself. Once the springs and pins are in place, be sure to replace the action arm through the housing. Be sure that it lines up with the holes before replacing it. As you are putting the parts in place, be sure to use your thumb to hold down the action arm. This will prevent any parts from flying out.
  3. Find your disconnector spring. Once you have it in hand, there should be a hook. This disconnector spring should be connected to the action lever. There should also be a loop on the spring that is pointed downward. The hook on the spring should be facing backward. The straight piece on the spring should also stick up.
  4. Be sure to move the spring around until the pin that holds all this together goes through it. Use your tools if need be to ensure that everything is lined up. That's because the pin will have a habit of going in another direction. Just pop it in. Afterward, check the action hammer. At that point, there should be some tension on it.
  5. Next, take the trigger itself. Then take your disconnector and attach the trigger to it. The tail end of the trigger should be facing to the left. Take your trigger spring and push it through the hole that is located above the trigger. Take the straight end of the disconnector spring and push it down so it pops underneath the disconnector.
  6. Take the connector. As you replace this, it should be faced in a backward angle. Take the tab located above the trigger on the right-hand side and slide it through the connector. Part of the disconnector will be pressed against the sear. Hold back the sear and replace the disconnector. There should be a notch at the end of the disconnector sticking out. Take your trigger and line up the socket with the notch. Keep the trigger return spring in place as you put it all together.
  7. As you're holding everything together, take your trigger pin with your free hand and stick it in the hole. Afterward, you should have a functioning trigger.
  8. Replace the hammer. Slide it in with the round part entering downward. Push the hammer in until the pinhole is aligned properly. Replace the appropriate pin.
  9. Take your crescent wrench. Inside the hammer, there’s a pin going across. Then there is another top pin. There’s a notch that needs to go downward and over the hammer pin. You’ll know which pin to use. Using the needle nose pliers, you can hook it up right over the upper pin.
  10. Take your plunger and mainspring and slide them in. Hold them in place. Now your hammer should have some distance.
  11. Finally, compress the spring located on the rear of the trigger assembly. Push the tension pin in.
  12. Double check to see if everything is working. If all is good and well, then the trigger is good to go.

If you are still having difficulty learning how to assemble or disassemble your Mossberg 500, this video will help.

Conclusion

Finding the best Mossberg 500 trigger assembly and parts won’t be a challenge if you know what to look for. Even if you’re missing parts with your current trigger assembly, it is important to know that you have everything in place before installing your trigger and putting it to good use. Remember, without the right parts, the trigger assembly itself is unsafe to use. So always double check if you have the right parts assembled in their proper places before you take your Mossberg on your next adventure.

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