Best 9mm AR Buffers of 2022 – Ultimate Top Picks Reviewed

| Last Updated: March 15, 2022

Every part of an AR-15 style rifle is important to the rifle’s functionality and reliability. The buffer and buffer system is no different. Primarily tasked with cycling the bolt carrier group when the rifle is fired, the buffer system can also aid in reducing recoil and making the cycling process a smoother one. The same holds true for a 9mm AR-15. Otherwise known as an AR9, this pistol caliber rifle utilizes the buffer system in the same way.

Keep reading to learn more about AR9 buffers and to see the best 9mm AR buffers available to buy today!

Comparison of the Best 9mm AR Buffers

  • Built for carbine AR buffer tubes.
  • Best 9mm AR buffer for the money
  • Designed to decrease gas blowback
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  • Includes a 6-position buffer tube.
  • Castle nut and latch plate included
  • Best buffer spring for a 9mm AR buffer
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  • Single-stage drop-in design
  • Best overall 9mm AR buffer
  • Designed for 9mm AR-15 pistols, carbines, and rifles
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  • Very light in weight
  • Best buffer spacer for 9mm AR buffers
  • Made from high-quality billeted aluminum and a black anodized finish
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  • Weights 5.4 ounces
  • Drop-in design for easy installation
  • Works with both Colt and Glock style magazines
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What to Watch For When Buying a 9mm AR Buffer

There are a few key things to look out for when shopping for and buying a new 9mm AR buffer. Performance and reliability are important to every shooter building a rifle or modifying an AR-style rifle they already have.

A solid and high-performing 9mm AR buffer and buffer system optimizes the rifle. Adding that together with a bevy of other high-quality parts makes for an all-around impressive weapon. The following tips and information should be a good place to start your 9mm AR buffer buying process.

This Section Written By: Brian Belko

Expert Author

Brian Belko: Gunmann Author

Brian is an experienced freelance writer and technical writer who has previously written for publications such as Wide Open Spaces, Bigfoot Gun Belts, Alien Gear Holsters, and Kampgrounds of America. He brings both a passion for writing and a love of the outdoors to his published content.

Aside from writing and the outdoors, Brian enjoys gardening, being a co-host on The Nostalgia Blast Podcast, and learning to code.

Punching Up

Similarly to boxing, buffers can be divided into six different weight classes. The weight classes are as follows: Carbine, Heavy, H2, H3, HSS, and XH. The type of rifle you have will determine which one will work best for you. For an AR9, you will generally have the best results with an H2 buffer. An H2 buffer weighs about 4.7 ounces which is an ideal weight for smooth operation in a 9mm AR rifle or pistol.

Pumping Gas

One important piece of information to make sure you know before choosing a buffer to buy is the type of gas system your 9mm AR uses. It will either have a pistol gas system or a carbine gas system. Not all buffers are compatible with all gas systems.

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There are some designed specifically for each gas system, but some buffers that work with both do exist. Just make absolutely certain that you don’t accidentally buy a buffer that won’t work with your gas system. There are few things more frustrating than receiving a new gun part only to realize it won’t work for your needs!

More on Compatibility

Aside from the gas system check, it is also important to double-check that the buffer you want to buy will fit in your buffer tube. This might sound obvious, but it can be one of those things that can be overlooked in the rush to get your new buffer on its way to your gun bench.

In that same vein, this is also a good time to make sure you have all the tools you need to change out your buffer and everything else you need to make the change. Replacing a buffer is not a big job by any means, but it still pays to be sure you are prepared and ready to go.

Review of the Best 9mm AR Buffers

Below is a list of the six best 9mm AR buffers that are currently on the market. As you go through each one, be sure to take note of the features and functions. This way, it will give you a better determination of whether or not it matched your ideal buffer.

Close enough is a lot better than nothing at all. Now, let’s begin our list by unveiling our “best overall” choice for 9mm AR buffers: 

Best Overall

Spikes Tactical ST-9X 9mm Heavy Buffer SLA009X

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What Recent Buyers Report

A lot of recent buyers were satisfied with the buffer overall. It was very affordable for most budgets and definitely makes for a solid unit for heavy duty AR-style firearms. Especially those of the 9mm caliber. Recent buyers loved the overall performance and reported no jamming or reliability issues after 100+ rounds.

Why it Stands Out to Us

Now, we take a look at the buffers that stand up to the heavy hitters. This is built from stainless steel and is solid as a rock. Despite being a bit weighty, it does have its advantages. In fact, it will absorb a lot of recoil and shock much better than standard AR buffers.

Who Will Use This Most

Obviously, this will be best used by those who have AR-style pistols and 9mm rifles that will pack a good deal of punch. So they will need a heavy buffer that can handle all that energy. This might be the closest that they are going to get when it comes to “tough and affordable”.

What Could Be Improved and Why

Despite the fact that it has a good deal of weight, it might add a marginal amount on your rifle or pistol overall. One thing that could be improved with this would be to include a spring that will have the ability to handle this buffer in particular. Not all regular buffer springs can handle the weight of this specific buffer. 

Bottom Line

If you’re looking for something that is built tough and doesn’t suck the life out of your bank account, you’ll definitely want to give the Spikes Tactical ST-9x Heavy Buffer a shot. It’s heavy in weight but heavy in duty. That means it’s built to last and built to take on whatever recoil your AR can dish out.


Very Stable Construction

Easy to Install For Most Users

Better, More Controlled Follow-Up Shooting

A Lot Less Recoil When Compared to Other Buffers

Does a Good Job Balancing the Weight On Most Pistols


Might Be a Little Challenging to Install

Might Be a Little More Weighty Than Expected

A Little Stiff at First, But Gets the Job Done Once You’re Getting Used to it

Best Buffer Spring

Luth-AR 9mm Carbine Buffer Assembly

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What Recent Buyers Report

This is another easy to assemble kit that can be put together rather quickly. Most recent buyers had no trouble assembling it or adding it on to their 9mm AR-15 pistol or similar firearms. One buyer said that the including of a buffer tube was more than enough to get him to purchase it. The buffer tube is even durable enough to handle all kinds of pistol braces.

Why it Stands Out to Us

This kit has the ability to handle the heavy-duty carbine-style AR pistols and rifles. Once again, this has all the parts you need to fully assembly the buffer system for easy installation. Perfect if you’re using it for a pistol or an SBR. Either way, it can handle some multiple instances of shooting.

Who Will Use This Most

This will likely be used by those who are target shooters or competitive shooters. Specifically, this will be a favorite among AR-15 pistol owners and even a handful of SBR shooters. The parts are strong enough to handle multiple episodes of shooting. Even during an extended range day, it can handle the load.

What Could Be Improved and Why

Despite no obvious cons, this assembly kit should only be used for carbine-style AR-15 pistols. The odds of this working with pistol length gas systems are not favorable. So err on the safe side and use this if you know your 9mm AR is a carbine-style AR.

Bottom Line

While the focus is on a buffer spring, you get a pretty solid spring with the whole entire kit to boot. If you’re looking for a pretty good kit assembly for carbine-style 9mm ARs, make no mistake that this is the best possible option for you. This can handle the heavy duty stuff that a regular pistol length gas system might consider too much to handle.


Easy to Assemble

Fits Most 9mm AR-15 Pistols

Easy to Install, Takes a Few Minutes

All Parts Are High-Quality and Durable

Reliable Firing, No Jamming or Issues to Speak of



Best Buffer Spacer

Spikes Tactical 9mm Buffer Spacer

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What Recent Buyers Report

A lot of recent buyers were in search of a buffer that would reduce a great deal of friction. This spacer is designed to prevent any reliability issues within the buffer assembly. It also plays a role in making sure your buffer is working properly and is able to handle the recoil and shock of every shot.

Why it Stands Out to Us

A spacer is a must-have part of your buffer assembly. We can say with confidence that without it, the buffer assembly is not so much useless but rather it will make firing your AR a little more awkward. This spacer is made from high-quality materials that can stop some of the shock associated with recoil.

Who Will Use This Most

This will be used mostly by AR-15 pistol and SBR owners. Either way, it’s a buffer spacer that will be used for all kinds of applications and purposes. It will also be used by those who just want to install a buffer assembly and be ready to fire off their rounds on the same day.

What Could Be Improved and Why

One of the improvements would be to make sure that it’s measured properly to fit all kinds of buffer tubes. This way, it’ll save a lot of time and frustration for users who might spend time making modifications to ensure a perfect fit.

Bottom Line

If you’re looking for a high-quality part that is vital to the buffer assembly, the Spikes Tactical 9mm Buffer Spacer might be exactly what you’re looking for. It will do its part in making the buffer work properly while reducing a good amount of shock that could otherwise throw your shot off.


All-Around Durable

Reduces Quite a Bit of Recoil

Works Perfectly With Most 9mm AR-15 Pistols

Has the Potential to Last You Years, Even Decades

Light in Weight, Adds No Additional Weight to the AR


Installation Might Be a Challenge

Some Trimming Might Be Required

May Not Fit All Kinds of 9mm AR-15 Pistols

4. Armaspec Sound Mitigation AR-9 Buffer – ARM158-9

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What Recent Buyers Report

Recent buyers were happy with the installation process of this buffer. It took minutes and the right kind of tools. This saved them the time and money that would otherwise go towards a professional gunsmith. Once installed, the firing ability was solid and cycling was smooth and reliable. No jamming or any related issues were reported. 

Why it Stands Out to Us

This already has the buffer and the spring itself assembled and ready for action. Aside from that, you can bet that this will probably be one of the easiest buffers you’ll install on any 9mm rifle or pistol. Other than that, it’s a solid little unit with a whole lot of toughness when standing up to recoil.

Who Will Use This Most

This will have the ability to handle multiple rounds of gunfire. In translation, it will be tough to handle the recoil again and again. So this will likely be a choice among target shooters and competitive shooters since they are more likely to go through rounds upon rounds. This will last a good while so long as you take excellent care of your 9mm AR-15 pistol.

What Could Be Improved and Why

While there are no obvious cons to report, some recent buyers have reported receiving an incomplete set of parts that went with this. If your buffer arrives with missing parts, you’ll need to contact customer service from the store of where you purchased it. 

Bottom Line

If you’re looking for a 9mm AR buffer that is considered the one of the best of the bunch, you’d be hard pressed to find something as reliable and tough like the Armaspec Sound Mitigation AR-9 Buffer. This will definitely work to your advantage whether you’re using a 9mm AR-15 pistol or rifle of your own.


Super Strong Buffer Spring

Smooth, Very Quiet Operation

Very Tough Material for the Buffer Itself

Moves Smoothly, No Stiffness to Speak of

Easy to Install, Takes Minutes and the Right Kind of Tools



5. Angstadt Arms AR-15 9mm 5.4 oz Carbine Buffer Assembly w/Carbine Buffer Spring

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What Recent Buyers Report

Most of the recent buyers had no issue with the installation process of this buffer tube. Once installed, the shooting ability was smooth and didn’t jam through 100 yards. One recent buyer even said that he even noticed a slight reduction in recoil, but not enough to its liking since he didn’t have other accessories to make it less noticeable. Most buyers used this for either their Colt or Glock pistols and were able to fit them with little to no issue.

Why it Stands Out to Us

One of the things that make it stand out is that it’s a lightweight unit that adds literally no significant weight to the rifle itself. Other than that, it’s slightly longer than some buffers with springs. This will work with two of the best types of pistols there is on the planet. Even in the heart of the Glock vs Colt debate, there is a buffer that treats these pistols equally.

Who Will Use This Most

Obviously, this will be used by those who might either have a Glock or a Colt 9mm AR-15 pistol. But don’t consider it the only pistol you need to use this. It’s the best in terms of compatibility. But if you’re a target shooter or a competitive shooter looking for a solid buffer to work with, then this could be yours to own.

What Could Be Improved and Why

Nothing out of the ordinary, but the spring itself might be a little stiff to move. It could be a good thing when it comes to handling recoil but it shouldn’t be mistaken for being ineffective or even useless. Lightening the spring a bit without jeopardizing the quality might be a worthy improvement.

Bottom Line

If you’re looking for a viable alternative to the previous Armaspec buffer, the Angstadt might be the closest thing to it. It’s a little longer than its Armaspec counterpart and will definitely work to your advantage in applications where you’re going through magazine after magazine of your favorite 9mm rounds.


Very Easy to Install

No Issues Even Through 300 Rounds

Buffer Absorbs a Great Deal of Shock

It Comes With a Spacer For Better Functionality

Spring is Super Tough, Can Handle a Lot of Recoil


May Not Fit All 9mm AR Buffer Tubes

Movement May Be a Little Stiff Upon Initial Use

Installation Might Be a Challenge For Some Users

6. Foxtrot Mike Products – AR-15 9mm Receiver Extension Assembly Pistol-length

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What Recent Buyers Report

Most recent buyers were satisfied with this buffer kit. In fact, one buyer said that it was good enough for him since all the needed parts were right there. It was convenient for him since it saved him a good deal of money and time rather than spending it tracking down every separate part. 

Why it Stands Out to Us

This has the whole kit and kaboodle right here. All you need is in one package. The entire kit is easy to assemble and are all made from high-quality materials for long-lasting usage. Other than that, it will deliver a solid performance like nothing else. It’s about what you’ll expect from any kind of buffer assembly that’s a step up from the standard, factory-issued buffer assembly. 

Who Will Use This Most

These will be used by those who are on a budget and simply want a full assembly kit. This will definitely save them a good deal of money and time. We know that tracking down every little part can be a challenge. It can also be really expensive. 

What Could Be Improved and Why

One of the things that could improve is making it so it can be one of the closest things you can get to a universal assembly. This does support 9mm AR-15 pistols, but it can have the potential to support more AR-15 pistols that have different calibers.

Bottom Line

If you’re looking for an assembly kit that is built to last and easy to install, the Foxtrot Mike AR-15 9mm Receiver Extension Assembly could very well be your best possible choice. Especially if you want the entire assembly all present and accounted for. This is perfect if you’re looking for a suitable upgrade or if you’re building an AR from the ground up.


Super Durable Construction

Hard to Scratch the Tube Itself

Very Reliable After 100+ Rounds Fired

All the Parts Fit Perfectly With No Issues

Buffer Tube Fits With Most AR-15 Pistols


May Not Fit All AR-15 Pistols

Installation Might Be a Challenge For Some

Might Come With Missing Parts Upon Shipment

What is a Buffer? 

The buffer is a tiny piece that is located inside the buffer tube of numerous rifles. Along with the buffer itself is the buffer spring that supports it and gives it the ability to move around. The buffer tube is attached to stocks. But in the case of a 9mm AR-15, most of these buffer tubes will be void of a stock since AR-15 pistols do not require them.

The purpose of the buffer itself is to make the firing ability of your pistol more effective. Without it, it’s just another single shot machine that is clunky and not as effective. The buffer does its part in absorbing a good deal of recoil that will allow for better resistance on your end. 

Without this buffer, the energy will be too much to handle for the spring located inside and can break apart and thus makes BGC cycling much more difficult.

Foxtrot Mike Products – AR-15 9mm Receiver Extension Assembly Pistol-length

What Makes a Great 9mm AR Buffer?

There are some things that will make a buffer stand out much better when pitted against those that are ineffective and crappy in quality. Knowing what makes a great buffer will help you make that distinction between which is better than the other. Here are a few things on what to look for while looking for a 9mm AR buffer:


Most of the buffers will be made from rubber. This material will likely be your best bet if you intend to absorb and resist a great amount of recoil and the shock that goes with it. This will also help make the buffer spring handle a lot more while still being able to move. If you’re looking for a buffer spring, steel might be your best option here since it is a much tougher metal material for situations like this.


If you’re a budget shopper, the price tag will be a lot more important. Especially when you’re looking for the best buffer that you can afford. Once you find something that’s high in quality and fits your budget, odds are you might have found a winner. As a rule: never settle for cheap. A cheap price tag can mean poor quality.

Will it Fit Your Buffer Tube

Not all buffers will be created equal. So it’s important to get a good idea of whether or not it will fit your buffer tube in particular. Consider measuring the buffer tube itself while you’re looking for a suitable replacement buffer. If you don’t have one, you may want to consider getting a buffer tube along with the assembly itself. It should also be noted that some buffer tubes will come with an assembly itself.

Cautious Considerations When Buying

Before you consider purchasing a buffer for the sake of an upgrade or simply just to add it to a building project, there are some things you need to consider. The reason being is that this is one of these accessories that would make a 9mm AR hard to use without the entire assembly. With that in mind, here’s what you need to carefully consider:

Know Your Gas System

You’ll either have a carbine gas system or a pistol gas system. No buffers were created equal. Some of them are designed for pistol length gas systems, but cannot handle anything as powerful as a carbine. Likewise, a buffer made for a carbine won’t work effectively with ARs that are equipped with a pistol length gas system.

Armaspec Sound Mitigation AR-9 Buffer – ARM158-9

Make Sure You Have All The Right Parts

This is essential. A buffer tube won’t be the same without a buffer and the spring. The buffer won’t work if it’s in the confines of a buffer tube. In short, make sure that you have the right parts that can be assembled and put together in the rifle itself.


If you’re looking for a 9mm AR buffer, then one of these six could be yours. Find one that is excellent in quality and delivers on the promise when it comes to reliability. The higher the quality, the better the chance it will last you years or even decades. Regardless, this will definitely boost your firing ability a lot better than your standard, run of the mill buffers.

People Also Ask

The following are a couple of frequently asked questions that come from recently new buyers of these 9mm AR buffers. Use this section so you’ll be able to know a little more about these buffers and what their purposes are. Here are the following questions:

What is the Ideal Weight of a Buffer?

The short answer: it depends. To give you a longer explanation, it will depend on the gas system that you’re using. For example, if you’re using a carbine buffer then the ideal weight for a buffer should be about 3 ounces in weight. Heavy buffers will be slightly heavier by at least one ounce (4 ounces). 

What Material is Best for Buffers?

There are three kinds of materials that are high in quality but are made to make buffers durable and less likely to damage easily. Most buffers are made from aluminum, but can also be made from either tungsten or steel. Of the three, steel is proven to be the toughest of the bunch.

Josh Lewis the managing editor at Gun Mann and when he isn't writing about guns he is more than likely tinkering with them. He also enjoys hunting, fishing and spending time outdoors. As a lifelong gun owner he knows his stuff!

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