[2019] Buyer’s Guide: The Best Magazine Extensions for Remington 870

The Remington 870 is a great weapon for home defense, tactical use, and hunting. But its limited ammo capacity can be an annoyance for owners looking for more than the standard five shots.

Luckily, the barrel of the Remington 870 attaches around the magazine tube, allowing for the possibility of extending the tube further to fit more shells.

An easy fix is to use one of the magazine extensions available to extend the capacity of the gun. Depending on your Remington 870 model, installing the magazine extension may require some effort. To assist with this, we’ll help you select the right parts and guide you through the installation process, which can get a bit tricky.

Remington 870 Magazine Extension Comparison Chart

PRODUCT DETAILS
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Scattergun Technology - Remington 870/1100/11-87

  • Loop Models Accept Direct Attachment of Tactical Style Slings
  • QD Stud Models Include Swivel Studs Below Magtube
  • All the Models have been Specially Designed for 12-Gauge
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Scattergun Technology - Remington 870/1100/11-87 (2 shot)

  • Magazine spring is extra strong for absolute reliability in feeding
  • Follower is brightly colored for visual referencing of an empty tube
  • Works with three models of Remington shotguns, the 870, 1100 and 11-87
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Choate - Remington870

  • Increases Capacity by 3 or 4 Rounds Depending Upon Model
  • Specially Designed for 20-Gauge Rem 870 Models
  • Provides a Convenient Front Mounting Point for Carry Strap or Sling
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Remington Model 870 Magazine Extension Kit Up

  • Comes in your choice of blued or parkerized steel tube bodies
  • Can be used with the follower from your existing magazine tube
  • Includes everything necessary to raise your capacity by two or three
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Lancer Remington 870 Magazine Extension

  • Includes a strong magazine spring that you can cut to length
  • Comes in seven different lengths from plus-two to plus-eight rounds
  • Tough, light, and futuristic design combining aluminum and carbon fiber
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Carlson's Choke Tubes Magazine Extension 8- Shot Remington 870

  • Available in a total capacity of seven, eight, or ten
  • Follower is orange, letting you see when your mag is empty
  • Comes with all components needed to increase your shotgun's firepower
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Choate - Remington 870/1100/11-87 MATTE

  • Quick Easy and Simple to Install and Remove
  • Sling Swivel Clamp Secures the Extension to the Barrel
  • Provides a Convenient Front Mounting Point for Carry Strap or Sling
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Tacstar Remington 870/1100/11-87

  • Extends the Magazine Capacity by 3 Rounds
  • Package Includes all the Components Required for Installation
  • A Must Have Add-on for Home Defense Shotgun
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What is a Shotgun Magazine Extension?

Unlike rifles and handguns, most shotguns don’t have magazines you can attach to them for loading shells into the chamber. They usually require the user to load the shells into the chamber by hand, instead.

However, some shotguns have magazine extensions, which act like magazines, since they can hold shells in addition to the standard capacity. These extensions are shaped like hollow tubes that replace the regular magazine cap of the shotgun. The extension comes with a kit that adds functionality and allows for the tube to be clamped to the barrel of the gun for a secure grip and great look.

How to Pick a Great Magazine Extension

When selecting a magazine extension for your shotgun, keep in mind the material, durability, design, capacity, and fit of the item onto your shotgun.

The material of the extension will determine the weight and durability of the part. The magazine extension is usually steel or aluminum, but can be plastic, as well. You should go for one of the two metal options, as the plastic extensions are not robust enough for heavy use.

The fit of the extension onto your gun also matters. You don’t want to end up with an extension that is too tight to be screwed in all the way nor one that sticks out awkwardly from under your barrel.

Most magazines for the Remington 870 fall into either of these two categories, single-piece and two-piece. Extensions made from a single solid piece of metal, such as the Tacstar are preferable to stamped pieces, due to the way they fit perfectly to your gun.

Single-piece extensions are easy to install and remove and don’t need any additional tools. On the other hand, there is a trade-off for these single-piece extensions, as the shell rim and magazine follower inside the tube can get stuck at the point where the extension screws into the magazine. The best way to prevent this is to test the extension with any accessories you plan to use to ensure it works correctly with no jams.

Two-piece extensions are usually more versatile and repairing damaged extensions is easier as individual parts can be replaced, instead of replacing the whole extension. They can also be more reliable, if well-designed.  

Quick Take - The Best Remington 870 Magazine Extensions

Reviews of the Best Magazine Extension for Remington 870

Now that we’ve highlighted some of the main considerations that go into choosing a great magazine extension for your Remington 870, let’s take a look at some of the top models that made our list!

Pros

  • Looks good
  • Easy to install
  • Tough and durable
  • Great matte finish

Cons

  • None

What Recent Buyers Report  

A lot of new buyers had nothing but positive things to say about this mag extension. They were especially happy with the additional space they received to add more rounds. One user said he was in search of more rounds so he could make his target shooting sessions last longer. He got exactly what he wanted with this extension. 

Why it Stands Out to Us 

This extension is made from high-quality steel designed to be flexible and strong enough to handle extra rounds. It also comes with a visible guiding mechanism so you are able to load your shotgun with extra rounds without worrying about whether or not you have enough. The extender is fitted for 12-gauge shotguns, so if your Remington 870 is chambered to shoot these kinds of shots, then this extension might be the perfect fit for you. 

Made from machined steel, this magazine extension increases the capacity of a Remington 870, 1100 or 11-87 shotgun by either one or two shots, depending on the model selected. The threaded collar screws onto the end of the magazine tube and includes a magazine spring and unbreakable nylon follower.

It comes with either a stationary loop or a quick-detach swivel stud to accept slings of different types.

Who Will Use This Most 

This would be perfect for target shooters or even hunters that want to add on more shots to their Remington 870. Though it might not matter what application you use it for, there’s a good chance that at some point, your original capacity won’t be enough. That’s where an extender comes in handy. Use it to your advantage and you’ll have an accessory that will last you quite a while.

Bottom Line

If you want a high-quality magazine tube extender that will last you quite a while, this one from Scattergun Technology will certainly be the one you’ll want to have on hand. It’s tough, allows for more space for extra rounds, and will make the entire loading process a whole lot easier. 

Buying this extension is a no-brainer if you want a product that will last and is going to fit your shotgun perfectly.

Pros

  • Three models of Remington shotguns work with this set, the 870, 1100, and 11-87
  • The magazine spring strength is extra-high for the best reliability in feeding and function
  • The follower is brightly colored for easy visual referencing of whether or not your tube is empty

Cons

  • Newer tubes may require you to file down a detent for this set to work

What Recent Buyers Report

A lot of new users were looking for an extension that would at least give them two additional rounds for their shotgun. They found it in this version of a Scattergun Technology magazine extender. One user who shoots 12-gauge rounds frequently found this to be one of the best fitting extenders on the market. And he was quite satisfied knowing it was made with high-quality materials. No wear, no malfunctions, and an easy-to-see guide that makes loading easier are features a lot of new users got out of it.

Why it Stands Out to Us 

While it’s similar to the previous model we reviewed, it serves its purpose of doubling your shooting capacity. It’s probably what you’ll need if you want an extender that will add at least a couple extra shots to your Remington 870. Since it’s made from high-quality steel, the likelihood of this wearing down in the short term is unlikely. If you want something that will last you years and will consistently give you additional space for a couple of extra rounds, this is the extender you’ll want.

This is actually a product from Wilson Combat, the largest and most successful custom firearms company in America. Bill Wilson opened his custom shop in Arkansas in 1977 after being trained as a watchmaker, one of the highest precision fields of machine work out there.

The Remington 870 is the most sold shotgun in history, enjoying a large number of military and law enforcement contracts. As such, it has sparked the development of a huge industry of aftermarket 870 customizations. There are a limitless number of aftermarket components to tweak your 870 just how you like it, but one of the most popular is the magazine tube extension. The addition of a magazine tube extension requires the addition of a suitable spring and follower.

This set from Wilson Combat's Scattergun Technology includes an extra-powered spring for greater reliability. The follower is engineered for better feeding and brightly colored for visually referencing an empty tube. This spring and follower set work best with two or three-shot extension tubes.

Who Will Use This Most 

This will probably be better used by hunters that rely on their Remington 870 shotguns. Even for a couple of extra rounds, how can you not say yes to that? It will serve you in the long run, as this extender will last you a long time (as long as you take good care of it). For a long-term solution that will allow you extra rounds each and every time, this mag extension will be perfect for you.

Bottom Line

If you want high-quality reliability and a couple of extra rounds at your disposal when trying to knock down your next game target, this extender will probably give you more firepower than you thought you needed. Think about it...extra shots can equal more opportunities to drop that sought-after target. A lot better than a missed opportunity, right? 

This set is an excellent option if you need a spring and follower suitable for your two or three-shot magazine tube extension. The best features of this set are the strong spring and the easy-to-see follower.

Pros

  • Fairly easy and quick to install
  • Solid and robust extension tube
  • The finish will match the matte finish of a shotgun
  • Spring and follower are much better than the factory ones

Cons

  • Doesn’t come with instructions

What Recent Buyers Report

A lot of new users were satisfied with how easily this allowed them to load their shotguns. They also added it was perhaps, one of the most durable extenders they’ve used. One user even said that, given its durability, he was confident he would add on more rounds without worrying about breaking it or hastening its demise. Most new users were hunters and casual target shooters.

Why it Stands Out to Us 

This extender is more apt to support 20-gauge rounds. Since we’ve mostly been focused on 12 gauges for the last few extender reviews, we’ll focus on a different caliber. The 20-gauge has a bit of power, which is great for most hunters and home defense users. But if you need a few extra rounds to get the job done, so be it. That means finding an extender that will make sure you get the extra shots you need consistently and for as long as you are able to use the extender. Consider this your long-term solution if you need extra rounds for a 20-gauge Remington 870.

This easy-to-attach magazine extension is made from steel with a matte finish. It includes an extended spring, follower, and swivel clamp, which secures the extension to the barrel.

With this, the threaded tube replaces the shotgun magazine cap screw to extend the maximum load of the gun. Additionally, a sling swivel clamp is available separately. Models come in 3, 4, 7, and 10-round extension options.

Who Will Use This Most 

This would be the ultimate extension addition for Remington 870 users that have a 20-gauge. This will come in handy for the long-term in almost any application. A few additional rounds above the normal capacity and you should be set for quite a while. Don’t be surprised if you are able to fit at least three additional rounds into your shotgun with this extender.

Bottom Line

If you want an extender that will look good on your Remington 870 (and can handle 20-gauge shots), you’d be hard-pressed to find something quite like this anywhere else. This will certainly be useful across many applications, including tactical and home defense. Hunters and target shooters will also benefit, as well with additional rounds, if needed.

You can buy this extension with confidence, knowing it will not only look good, but performs admirably no matter what capacity you select.

Pros

  • You can use the follower from your existing magazine tube with this set
  • Available in your choice of Parkerized or blued steel magazine tube bodies
  • Comes with everything you need to raise your magazine capacity by two or three rounds

Cons

  • Not available in stainless steel

What Recent Buyers Report

Most new users were looking for a magazine extension that was durable, dependable, and affordable. Sure enough, they found it with this factory-made magazine extension. Not only did it allow them to extend their firing power by a few shots, but they were also seriously impressed with the solid build made of Parkerized steel. One user even said it was a lot sturdier than most of the extenders he has tried in the past.

Why it Stands Out to Us 

This extender is available in different lengths (which is dependent on the length of the barrel). No matter what length you choose, it will be an excellent fit and it will pave the way for all kinds of extra shots at your disposal. If you want something for the purpose of giving you more shots for hunting, target shooting, or home defense, then you’ll definitely want an accessory that will give you a boost. If you want something that allows for easy loading and better capacity space, this extender just might do the trick.

Founded in 1816 in Connecticut, Remington is the nation's oldest firearms manufacturer and the largest maker of long guns. The company enjoys many cherry-picked military and law enforcement contracts. The 870 is one of their most successful products and is, in fact, the best selling shotgun in history.

As such, customization options abound, and how better to improve your 870 than with an aftermarket magazine tube extension kit from Remington itself? Although the firearms industry is largely responsible for standardized manufacturing in general, sometimes components from manufacturers other than the one that made your gun don't work as perfectly as they are supposed to. This Remington magazine tube extension kit not only avoids that problem but also includes everything you need to start packing extra firepower in your 870.

This set comes in three options. You can choose a Parkerized steel three-round extension or a two-round extension in either blued or Parkerized steel. Each version comes with a spring, an end cap, a magazine band, and its bolt. You can use the follower from your existing magazine tube.

Who Will Use This Most 

This would be ideal for many applications across the board. So you won’t have to worry about whether or not the extender is effective for one purpose or the other. Make no mistake about it, if you’re in search of a solidly built extender that will work hard and continuously give you the extra shots you need, this might be the product for you. And don’t be surprised if this extension stays working for years or even decades. 

Bottom Line

If you are looking for a factory replacement magazine extender, this one from Remington themselves might just be the one you’re looking for. Just fit this on your shotgun and you’ll enjoy more rounds, which means better shooting opportunities no matter what the application. How can you possibly say no to more shots?

It's always nice to use add-ons and accessories from the manufacturer of your firearm so you can be more confident with the reliability. The top features of this tube extension set are the inclusion of all necessary components and the choice of blued or Parkerized steel.

Pros

  • Durable, light, and space-age construction combines aluminum and carbon fiber
  • Available in seven different length options, from plus-two rounds to plus-eight rounds
  • Comes with an extra-strong magazine spring that you will need to cut to the correct length

Cons

  • Not the most affordable option

What Recent Buyers Report

As expected, a lot of new users were pretty happy with the durability and ease of installation. They had their choice to extend their capacity from two to eight rounds. Most users were happy with the additional boost in capacity of their choosing, which was based on their intended applications. One user found the three-round extender and said it was enough for his Remington 870 while he’s out hunting. After 20 rounds of use, a lot of new users report it still worked without any kind of malfunction or reliability issues.

Why it Stands Out to Us 

This magazine extension is constructed with high-quality materials that are reinforced with carbon fiber. It’s built like a tank and will make it impossible to wear. So you can load as many shots as you want. It won’t wear down at any time soon. Furthermore, it’s an easy-to-install accessory that takes a few minutes and the right kind of tools. You don’t need a professional to do that for you. If you need more shots, you have a choice to choose the number of extra rounds you need.

Lancer is a company from Quakertown, Pennsylvania that specializes in space-age materials for the aerospace industry and also uses some of these materials to produce high-grade firearms and firearm components.

A good example is this series of magazine tube extensions for the Remington 870, which are made from carbon fiber. Lancer offers seven sizes of these extension tubes, from plus two-rounds to plus eight-rounds. Depending on the specific model of your Remington 870, many of these tubes will extend beyond the muzzle of your shotgun. Don't worry though, simply use an extension clamp, available separately, to secure your extension tube.

These extension tubes come with an extra-long strong magazine spring that you can cut to the correct length for your extension size. These extensions only take about five minutes to install and are perfect for three-gun competitions or simply to look cool with a space-age component sticking off the end of your shotgun.

Who Will Use This Most 

Depending on the number of additional rounds you need, this will be useful for many users. If you hunt, target shoot, or defend your home with a Remington 870, it’s up to you how much more extra space you need. But if you need an extender that will last you years or decades on quality alone, you’d be a fool to pass up the opportunity to give this unit a closer look. 

Bottom Line

The Lancer Remington 870 Magazine Extension might give you more rounds. But the durability will be the true money maker here. Some extensions don’t last forever. But this one will hold you over for many years. Once you install this on your shotgun, expect to be loading up as many shots as you need to make your Remington 870 as useful as possible for a long time to come.

Lancer is on the cutting edge of military engineering. Looking at what they are making is a good way to find out what the future of firearms holds. The best features of this magazine tube extension are the high-end materials and the broad choice of capacity upgrades, from two rounds to eight. The ease of installation is also a great perk.

Pros

  • Ships with all the needed components 
  • Three versions are available which increase your total capacity to seven, eight, or ten rounds
  • The follower is hunter orange, helping you to visually reference when your magazine is empty

Cons

  • Bluing is matte and finish is slightly rough

What Recent Buyers Report

Most new users were target shooters (and some hunters) looking for an extension that allowed them a capacity that ranged from seven to ten rounds. They found this extension to be exactly that. Many of them were quite happy with the installation process, along with the amount of space that allowed them to load up their 12-gauge shots. One user said he wasn’t complaining at all after installing this extension on his Remington 870. He added that with eight shots at his disposal, he was able to have more time at the range compared to some other shotguns that allowed him only six rounds to shoot. 

Why it Stands Out to Us 

This extension is available in different capacities. What you choose will be based on your personal needs and preferences. Typically, the more shots you have, the better. Aside from the capacity, it’s the high-quality materials that make sure this stays with you for the long-term. So if more shots for years or even a decade to come is what you want, why not invest in an extension like this?  

Carlson's is a Kansas company that specializes in shotgun components. All of their products are covered by a lifetime warranty. These Carlson's magazine tube extensions come with everything you need to increase the firepower of your shotgun.

The set includes a blued steel tube extension, a spring, a high-visibility follower, and an extension clamp. The follower is bright hunter orange to help you visually reference when your magazine tube is empty. The extension tube is threaded to replace your magazine cap. It simply twists on in a few seconds, giving you an effective increase in magazine capacity. They are available as extensions, giving you a total of seven, eight, or ten rounds of 2.75 inches with one round in the chamber.

If you have a newer magazine on your Remington 870, you will need to remove the tab or detent in your magazine, probably by filing it down. Carlson's have designed these mag tube extensions with home defense, competition shooting, and law enforcement applications in mind.

Who Will Use This Most 

This would be excellent for hunters and target shooters (mostly competition shooters). These are the two types of shooters that will typically benefit from additional rounds. If you are a hunter that needs eight rounds or a hunter that needs ten, you can’t go wrong with adding an extension to your Remington 870. And since it’s high in quality, you know that it will last.

Bottom Line

The Carlson’s Remington 870 Shotgun Magazine Extension Tube is probably the go-to extender for you if you need extra rounds and fast. All it takes is choosing the number of rounds you need in order to fulfill every shooting application. If you have a Remington 870 that is in need of a real boost in shooting capacity, this might be the extender you need.

This is a great option for an easy, cheap, and large increase to your Remington 870's magazine capacity. The top features of this extension set are the choice of capacity increase and the inclusion of every necessary component.

Pros

  • High-vis carrier
  • Looks good
  • Easy to install
  • Good fit and finish

Cons

  • Some found the supplied spring is too long

What Recent Buyers Report

As expected, new users were treated to either two or three additional rounds to their Remington 870 12-gauge shotgun. They were satisfied with how easily they added this onto their shotguns without the use of any professional installation services. The loading ability was easy as pie and no jamming or loading difficulties were reported. Even through 25 rounds, the extender stayed in working order. 

Why it Stands Out to Us 

This extension is pretty straightforward in its design. It’s tough enough to handle extra 12-gauge rounds that will come in handy in pretty much any application you can think of. It’s flexible, durable, and allows for easy loading with the help of the guiding mechanism. No more guesswork needed when loading your shotgun each time. In fact, it just might be the best extension to have if you are a beginner that has never used these types of accessories before. 

This easy-to-attach magazine extension is made from steel and comes complete with a matte finish. It includes an extended spring, follower and swivel clamp, which secures the extension to the barrel.

The threaded tube replaces the shotgun magazine cap screw to allow for extra slugs, while a sling swivel clamp is available separately. Models come in 2, 3, 4, and 5-round extension options.

Who Will Use This Most 

This might be the extension that will be best-used by newbies starting out with extending their shotgun capacity. Other than that, it’s perhaps one of the best quality extensions on the market built to handle multiple 12-gauge rounds. If you have a 12-gauge 870 that can do some damage, why not add more shots to your capacity and make using it enjoyable? You’ll probably enjoy shooting off extra rounds after installing this and the fun may never stop.

Bottom Line

No matter what the application is, at least you will have a few more shots ready to go in the magazine. The Choate Remington 870 Mag Extension will definitely make shooting your shotgun a lot more enjoyable each time you use it. What’s not to love about a high-quality extender that will give you a few extra rounds to work with?

While some users report having to trim the spring down to size, this extension is a solid purchase and will more than get the job done. One of the greatest benefits reported by recent buyers is its ease of installation.  

Pros

  • Multiple capacity options
  • Great fitment
  • Easy to install
  • Comes with excellent finish

Cons

  • The spring can get pinched at the point where the extension meets the magazine

What Recent Buyers Report

A lot of new users were owners of the Remington 870 12-gauge shotguns. They needed an extension that would allow three additional rounds. They were pretty happy when this extension allowed them that ability. One user even said that while three more rounds were good enough for him, he was happy knowing that he can get additional opportunities to go after targets he’s missed after the first two shots. 

Why it Stands Out to Us 

This has all the fixings you need to expand your shotgun by three more shots. So, if you are firing six shots, why not enjoy having nine? Or go from four shots to seven shots? No matter how many were in your original capacity, you can bet your bottom dollar that you’ll welcome the boost in capacity once you’ve added this puppy onto your shotgun.

This extension tube comes in a blue steel matte finish and attaches directly to the end of the magazine tube, increasing the capacity by as much as five rounds. It comes with an extended magazine spring, and barrel clamps are available separately.

Who Will Use This Most 

This will probably stand out as a general-purpose magazine extension. So regardless of whether you hunt, shoot targets, or anything else, you’ll know that three extra shots on top of your the original capacity will definitely be a plus for you. If you feel that you’re not getting enough shots for your Remington 870, then choosing a magazine extension like this one is a no-brainer.

Bottom Line

The Tacstar Remington 870 Magazine Extension is the real deal. Especially if you need to add three more shells to your shotgun. You’ll be quite satisfied to have so many shots you can use for any intended purpose. If you love your Remington 870 and want nothing but the best for it, you can consider a magazine extension like this a worthy upgrade. 

This extension is easy to install, but some users may face reliability issues, so test it well with any accessories before buying.

How to Install a Shotgun Magazine Extension

Once you’re selected your magazine extension, it's time to install it. Here’s a step-by-step guide for installation:

  1. Remove the barrel nut
  2. Put on the coupler. It doesn’t have to be too tight, just as tight as you can make it with your fingers.
  3. Put the spring in, but be careful at this step. It can get pushed out with force if you aren’t careful.
  4. Take the mag tube extension and screw it in.
  5. Attach the swivel assembly and line it up with the gap.
  6. Insert the screw and tighten it enough to keep it steady.

Some versions come with Dremels or dimples that prevent aftermarket modifications such as magazine extensions. But there’s a simple workaround for that, which is to simply remove those dimples before doing the steps outlined above. Here’s a step-by-step guide for removing the dimples:

  1. Remove the spring retainer.
  2. Remove the follower.
  3. Detach the barrel of the shotgun.
  4. Remove the foregrip and the bolt.
  5. Remove the trigger group by pushing out the two pins.
  6. Place a thin flashlight within the tube which holds the shells in order to illuminate dimples.
  7. Next, using a carbide burr, drill off the dimples. Be careful at this step, as it requires a steady hand. But stop using the burr when you shorten the dimple.
  8. Next, use a grinding stone attachment to grind the dimple even lower.
  9. Finally use a sanding drum to make the tube as smooth as possible.
  10. Replace the trigger group, the foregrip, and bolt, reattach the barrel, and carry on with the other steps outlined above.

Conclusion

Selecting the right magazine extension for your Remington shotgun boils down to fit, material, and its compatibility with the gun and its accessories. Always test the new extension with the accessories you’ll be using to ensure safe operation and no jamming in the future.

When installing the extension on your gun, follow the steps outlined above, but always follow basic safety precautions and take things slow to avoid damaging the extension or the gun. Check out the list of extensions we’ve recommended above for quality parts and a smooth shooting experience with your higher capacity shotgun.

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