The 7 Best Foldable AR-15 Stocks and Complete Rifles for 2024
Are you looking to make your AR more compact and portable? Are you looking for the best foldable AR-15 stock?
The AR platform continues to dominate the market with its adaptability, and the introduction of foldable stocks is yet another innovation that causes operators to love the platform so much.
Over the years we’ve tested our fair share of AR tech. When it comes to foldable AR-15 stocks, we’ve tried everything from adapters to integrated lowers to complete rifles.
Each option offers unique advantages and different benefits based on your budget and end goal.
We’ll break down our thoughts on the most popular options on the market, and help you figure out the best option for your setup.
If you’re in the market for a foldable stock, there’s a solution that’s right for you!
Why a Foldable AR-15 Stock?
Let’s cover a few things before we get into our picks.
You may be asking, why would anyone want to fold their AR-15?
There’s a few simple reasons.
First and foremost, it significantly enhances the portability and compactness of the rifle. If you’re running out of storage space in your gun safe, for instance, folding AR stocks can be a simple solution to maximize space before considering an upgrade to a larger safe.
Investing a few hundred dollars in a folding stock may be more cost-effective than spending thousands on a bigger safe.
Ease of transport is another key advantage. With a folding AR, you can easily fit a full-sized rifle into a backpack, making it convenient for travel. For motorcyclists, this is particularly beneficial, as they can now securely store the gun in the hard case of their bike while traveling to a destination.
Another benefit is for covert concealment. A folding AR-15 is an ideal choice for those who require a low-profile option for personal defense or tactical operations. The ability to reduce the rifle’s overall length without compromising its functionality means that it can be easily hidden in a variety of settings, from a vehicle to a backpack, ensuring readiness without drawing unwanted attention.
Now, let’s delve into why foldable stocks have been a challenge up to this point.
The Challenges of a Foldable AR-15 Stock
You want to fold your AR in half like a slice of New York pizza, how hard could it be, right?
The challenge lies in the design of the AR and the buffer tube.
For direct impingement AR-15s, the bolt carrier group (BCG) retracts into the buffer tube with each shot. This design is crucial for the rifle’s operation, as the buffer and recoil spring within the tube are essential for cycling the BCG.
When you fold the stock, which is attached to the buffer tube, you disrupt this mechanism. The stock can’t fold without either removing or somehow working around the buffer tube that houses critical components for the rifle’s cycling action.
Moreover, adding an adapter between the upper receiver and the buffer tube introduces further complexities, as the interaction between these components must now occur with the adapter in place.
There are a few workarounds to this issue, and each product below offers its own unique solution.
Let’s get into it and I’ll explain each solution along the way.
TRIED AND TRUE BEST ADAPTER: Law Tactical AR Folding Adapter Gen 3-M
LAW Tactical Gen3-M AR Folding Adapter
The Law Tactical adapter is the OG when it comes to AR folding stocks. I’ve used it a number of times on a few different builds and each time it has left me satisfied. It’s built to withstand abuse and functions without issues.
Palmetto State Armory (See Price)
Bud’s Gun Shop (See Price)
AR15 Discounts (See Price)
Rainier Arms (See Price)
AT3 Tactical (See Price)
Law Tactical was founded by Zachary Law, a former Secret Service counter-sniper, who had the idea for a folding stock while carrying his Knight’s Armament SR-25 up a ladder in an M4 bag that wouldn’t fully zip shut.
The way the LAW adapter gets around the buffer tube issue is by incorporating a hinged mechanism that allows the stock to fold without interfering with the rifle’s operation. It achieves this by mounting a hinge to the rear of the lower receiver, using a bolt carrier extension to ensure proper cycling of the BCG, and relocating the buffer retainer and spring to the adapter body.
What We Like: One of the things I liked about it is that it’ll work with any lower receiver and stock/brace tube combination you desire. That’s nice if you’re just looking to convert a current AR setup to utilizing a folding stock.
They’re currently on their Gen 3 model, which is a 4140 steel construction, meaning it’s durable as hell. It’s built for hard use and a long life, which is why it is the go-to option for law enforcement and military personnel.
One of the things I liked about this adapter is the tension and locking mechanism. It operates the way that I expected it to—no wobbling or looseness, just a secure, tight fit.
On that note, unlike some of the other models on this list, it’s easy to adjust the hinge tension using an allen wrench. The fact that this is even available on the part is a plus in my opinion, because some of the other adapters on this list provide zero options for adjusting the tension.
I found the LAW adapter easy to install. I thought the flange tool it comes with was kind of interesting. It’s helpful when screwing the Threaded Flange into the receiver, it’ll start to flex when the correct amount of torque has been applied.
As far as adapters go, the LAW is the best option for upgrading an existing AR setup to utilize a folding stock. I recommend it because it’s a solid product and will take whatever kind of abuse you throw at it. With it, you can keep your favorite furniture without the need to replace the rifle or build one from scratch.
Flaws but not dealbreakers: The biggest drawback from an operational standpoint is that the gun cannot be fired when folded. While it’s technically possible to fire a single round if one is chambered, it’s not advisable. Most folding adapters include a block to prevent the bolt from coming out, but I wouldn’t recommend testing that unless you want to risk taking a bolt to the torso.
The price is actually higher than some of the stripped lower options we have listed below such as the Shield Arms SA-15. Which begs the question of why would you pay more for this when you can just buy a lower receiver?
Well, if you just need to transform an existing AR into one that folds, rather than building one from scratch, then the adapter makes more sense.
Bottom Line: I’d mainly recommend it if you are looking to upgrade a current AR configuration without needing to buy a whole new setup. You can easily convert your AR without needing to buy a new upper, BCG, trigger, etc.
BEST BUDGET-FRIENDLY FOLDING AR-15 ADAPTER: Sylvan Arms Folding Stock Adapter
Sylvan Arms Folding Stock Adapter
The Sylvan Arms Folding Stock Adapter stands out as a more affordable option for those looking to add folding functionality to their AR-15 without breaking the bank. While I like the cost savings compared to the LAW Tactical adapter, it is a little bulkier and less durable.
AT3 Tactical (See Price)
Palmetto State Armory (See Price)
Primary Arms (See Price)
The adapter addresses the buffer tube issue in a similar fashion as the LAW does.
What We Like: The Gen 4 model has seen significant improvements from earlier generations. The hinge is now positioned lower, addressing the previous issue of finger pinching when pulling the charging handle. Additionally, the gap between the back of the receiver and the front of the end plate has been reduced for a sleeker fit.
The adapter features a couple of QD slots for convenient sling attachment. More attachment points is never a bad thing in my opinion.
It’s available as a left or right fold, so you can pick which works best for you.
Flaws but not dealbreakers: While the hinge is more compact than in previous generations, it still protrudes beyond the charging handle, making it bulkier compared to the integrated lowers on our list.
The adapter is made from aluminum, which, although durable, may not withstand the same level of abuse as the steel LAW Tactical adapter.
Bottom Line: The Sylvan Arms Folding Stock Adapter is an excellent choice for hobbyists or those with lighter usage needs. It offers functionality similar to the LAW Tactical adapter but at a more budget-friendly price point.
BEST FOLDING COMPLETE RIFLE: FoldAR MoBetta Complete Concealed Rifle (CCR)
FoldAR MoBetta Complete Concealed Rifle (CCR)
I really loved the “complete rifle” design with this option. I found the rifle to be the most concealable, as the MoBetta CCR has the joint between the barrel and upper receiver, effectively folding it in half.
If you’re in the market for a brand new AR and you want one that folds right out of the gate, the FoldAR MoBetta CCR is the way to go. This innovative design introduces a folding mechanism with a proprietary upper receiver, sidestepping the buffer tube challenges faced by other systems.
The FoldAR is versatile, available in a variety of lengths and calibers including 5.56, .300 BLK, and 6.5 Grendel, with the option for custom orders on less popular barrel lengths.
What We Like: The FoldAR achieves an unparalleled level of compactness for an AR. Its folding mechanism at the front of the receiver creates a balanced split between the upper and lower halves, resulting in a sleeker look when folded compared to other options. There’s also a locking detent that goes into the handguard, so it will stay in the locking position.
The first thing I noticed when picking it up is that the rifle feels remarkably solid, with no hints of wobbliness. It doesn’t feel like a cheap, gimmicky rifle.
When I got to testing it out, one of the things I liked is that the FoldAR rifle maintains its zero after being folded and unfolded. Basically, you don’t have to worry about the fold affecting the accuracy.
FoldAR has confirmed this through testing at the Texas A&M Extension lab (TEEX), finding a return-to-zero capability of approximately 0.05 MOA, though I haven’t been able to find a link to the results online.
Nonetheless, if you’re using this as a truck gun, then you can still trust it’ll still shoot straight after it’s been sitting in your cab for a while.
One of the things I loved about the design of this rifle is the Quick Change Barrel System, which allows you to swap calibers and barrel lengths quite easily. Simply removing the pin in the hinge allows you to quickly swap out different barrels. From my experience, it’s one of the easiest barrel change processes out there.
Also, if you want to double the folding madness, you can also add a Dead Arms MCS Adapter to the lower receiver, for an even more compact rifle. Double FoldAR!
Despite the proprietary upper receiver and barrels, the lower and furniture is all standard stuff, which gives you some flexibility for swapping out components based on personal preference.
Flaws but not Dealbreakers: The folding mechanism takes some getting used to. Unlike other adapters that snap back into place, this system requires a few extra steps. You’ll need to pull back the charging handle, which retracts the bolt, to properly align the receiver, and then tighten it down using a latching mechanism built into the side of the handguard.
If you’re in a hurry to go from folded to firing, this mechanism will slow you down compared to other alternatives. It took me a time or two to get the process down, but then it was a cakewalk.
I put a lot of rounds through our FoldAR and there was one issue that seemed consistent, which is the heat produced by the rifle.
While the rifle maintains its zero exceptionally well when cold, there can be a slight shift in zero if the gun is folded when hot. This is because the inside is made of aluminum and steel parts, which are going to expand and contract at different rates.
Running a few rounds through the heated rifle should bring it back to zero.
Bottom Line: This is one of my favorite folding AR solutions on the list. The FoldAR provides a solid rifle with a unique folding mechanism, offering unrivaled portability and compactness without compromising on performance.
BEST FOLDING AR STRIPPED LOWER: Shield Arms SA-15 Lower Receiver
Shield Arms SA-15 Lower Receiver
What I liked the most about this option is that it’s best for building an AR with a folding stock from the ground up. The folding mechanism is integrated into the lower receiver and it’s less expensive than some adapters.
Brownells (See Price)
Shield Arms, known for their innovative Glock 43X 15-round magazines, has once again impressed with their integrated foldable AR lower receiver. For those looking to build a foldable AR from the ground up, the Shield Arms SA-15 lower is an excellent choice.
The SA-15 lower features a unique design with a steel-nosed buffer that compensates for the added space from the hinge, ensuring seamless action cycling.
What We Like: The SA-15 lower is going to cost less than the LAW adapter, which makes it more ideal if you’re building an AR. Why opt for just an adapter when you can have a complete lower receiver for less?
Overall, I thought the SA-15 outshines the adapter alternatives in many ways. Its hinge is smaller, and the distance from the back of the receiver to the front of the end plate is under one inch, making it more compact than any adapter on our list.
This lower is machined from 7075-T6 aircraft grade billet aluminum. It also ships with a proprietary standard weight buffer and buffer retaining pin.
For those who prefer a ready-to-go solution, Shield Arms offers complete rifles equipped with premium components such as a Midwest Industries handguard, Radian safety and charging handle, Geissele bolt catch, B5 buttstock, and more.
Flaws but not Dealbreakers: The main drawback of the integrated lower is that it doesn’t meet mil-spec standards due to the integrated folding mechanism. Therefore, military or law enforcement personnel who require mil-spec compliance will want to stick with the LAW Tactical adapter.
The steel-on-steel design of the folding mechanism is a positive aspect for durability, but it also contributes to the overall weight of the lower receiver. That said, however, it’ll still weigh less than the LAW.
Side note—You may see a similar lower on the market from 17 Designs. Shield Arms actually owns the patent and licensed it to 17 Designs, but from what I can see online, 17 has gone out of business and those are no longer being produced.
Bottom Line: The Shield Arms SA-15 integrated folding lower is one of my favorite options for a foldable AR-15 stock. It’s an excellent choice for anyone planning a new rifle build or considering a lower swap. It offers a more compact and low-profile hinge compared to adapters, and it’s more budget-friendly as well.
BEST ADAPTER THAT SHOOTS WHEN FOLDED: Dead Foot Arms MCS Adapter
Dead Foot Arms MCS Adapter
If you’re looking for a foldable stock solution that allows you to still fire when folded, the Dead Foot Arms MCS adapter is the best solution on the market. It’s available for 5.56 in both left and right-hand versions.
What We Like: The Dead Foot Arms adapter is a bit unique to this list, as it allows operators to continue shooting when folded by using a dual recoil spring system housed within the upper that enables continuous cycling of the action.
One of the first things I noticed about the Dead Foot Arms adapter is that the stock folds down at an angle. This is done so that the stock is not covering the ejection port while firing when folded. That’s a nice touch.
The 4” version is compatible with any standard BCG, while the more compact 2.5” model requires a specialized shortened BCG, which Dead Foot Arms provides as part of the package. They also offer a service to modify your existing carrier to fit their system.
Here’s a closer look at how the internals work:
Flaws but not Dealbreakers: I felt like the hinge was a bit too loose for my liking. Unfortunately, the MCS adapter does not provide a way to tighten the tension.
Some competitors, such as the Law Tactical adapter which includes an L-wrench for tension adjustments, the MCS adapter doesn’t. This issue stems from the adapter’s construction, which predominantly uses aluminum coupled with steel guide rods. This design choice results in a degree of wobble due to the two contact points.
You might be able to resolve this with loctite, which is what Dead Foot Arms recommends, but it could be a tolerance issue.
Bottom Line: The Dead Foot Arms MCS Adapter is a pretty neat invention that allows direct impingement gas systems to continue firing when folded thanks to its dual recoil springs.
This feature, while niche, could prove invaluable in situations requiring compact carrying without sacrificing immediate action readiness. While I don’t particularly have a need for it, those who value the blend of compactness and readiness will find this adapter appealing.
BEST BUFFERLESS FOLDING AR RIFLE: Foxtrot Mike FM-15 Complete Rifle
Foxtrot Mike FM-15 Complete Rifle
Foxtrot Mike enters the scene with their FM-15 model. I was fairly impressed with this rifle’s recoil management and ability to shoot when folded, though the charging handle is a bit quirky.
Primary Arms (See Price)
What sets this rifle apart is its side-charging assembly that completely does away with the traditional buffer tube and spring assembly. This enables the integration of a folding stock which is not just a gimmick but a practical, space-saving feature.
What We Like: The FM-15 features a 16-inch nitride barrel chambered in .223 Wylde, making it compatible with both 5.56 NATO and .223 Remington cartridges. This versatility is a plus for us shooters who keep both 5.56 NATO and .223 Remington rounds on hand.
I liked the free-floating handguard with ample M-LOK slots, which seems like it should be a requirement these days. I also liked that you can use AK 5.56 mags in the FM-15.
The FM-15 uses a direct impingement gas system, which is better for accuracy, and despite the modifications, this rifle maintains that standard.
The rifle uses a unique lightweight bolt carrier that operates on a dual nested recoil spring contained within the upper receiver, which helps manage recoil effectively. This setup allows the rifle to be fired even with the stock folded, similar to the Dead Foot Arms adapter, though they achieve this in different ways.
Flaws but not Dealbreakers: While the non-reciprocating charging handle can be adjusted and positioned on either side of the rifle, it feels a bit stiff and requires more force than I expected. This could be a minor annoyance during prolonged shooting sessions.
I also thought the Zukov stock, though functional and contributing to the overall compactness of the rifle, wasn’t super appealing. It’s a bit of an unconventional look on the AR platform and has some limitations on length of pull.
The folding stock, while providing the advantage of compactness, offers less adjustability in terms of length of pull compared to traditional setups.
Bottom Line: Overall, the Foxtrot Mike FM-15 is another excellent full rifle solution with a foldable stock in the AR-15 market. While it has a couple of quirks, such as the feel of the charging handle and the odd choice of a Zukov stock, these are not dealbreakers and are well worth considering for the added practicality of its folding design.
BEST BUFFERLESS RIFLE STOCK ADAPTERS: JMAC Customs SS-8 Folding Mech
JMAC Customs SS-8 Folding Mech
This SS-8 Folding Mech is one of the most solid stocks I’ve had the pleasure to mess with. The stock is another option to consider if you have a bufferless rifle or lower receiver that utilizes a 1913 rear plate.
Rainier Arms (See Price)
Although we most often see the SS-8 Folding Mech used on AK’s, some AR options, such as the Bear Creek Arsenal AR-9, which is a bufferless rifle, can also use this stock since they utilize a 1913 pic rail rear plate.
These bufferless rifles do away with buffer tubes by including the recoil spring in the upper receiver. This allows for more plug and play options when it comes to the stock.
If you have a bufferless rifle, you can add a 1913 rear plate adapter to your lower.
You can also find these rear plates already outfitted on some lower receivers such as the Brownells BRN-180, which you can mate with your preferred AR upper.
What We Like: The installation process was fairly easy, it took me less than a minute to install.
A couple of things I noticed off the bat. Not including the folding mechanism, it weighs less than 5.4 ounces, which is incredibly light for a stock. That’s great if you’re concerned about overall rifle weight.
Also, I really liked that it was already drilled and tapped for a cheek riser. It’s an optional add-on, but it was a nice consideration to see this pre-drilled.
Once extended it feels as solid as a fixed stock. The mechanism that locks it into place is really well designed; it just snapped into place when extended.
Flaws but not Dealbreakers: This isn’t a universal stock, it’ll only be usable on some AR rifles. I really like it though, so if you have something with a 1913 rear plate, you should check it out.
With that being said, expect to pay a premium. You’re looking at somewhere around $250, which is quite pricey for a stock.
Bottom Line: As I mentioned before, this stock has been a pleasure to work with. It’s the most lightweight option on our list and although it’s not a universal one, those that can use it will have good things to say about it.
Final Thoughts on Foldable AR-15 Stocks
As you can see there are a number of options available to anybody looking for a foldable AR-15 stock.
If you have an existing AR, you can easily adapt it with the LAW Tactical or budget-friendly Sylvan Arms adapter. The Dead Foot Arms is also a great option if you still want the firearm to fire when folded.
If you’re looking to build a new AR, the best starting point is the Shield Arms SA-15 lower receiver. The folding mechanism is integrated into the lower, and cost-wise, it’ll save you some money compared to buying some adapters.
If you’re in the market for a new rifle, but don’t want to go through the building process, FoldAR and Foxtrot Mike FM-15 make some stellar options to consider.
And if you use a unique setup like a bufferless rifle, the JMAC Customs SS-8 Folding Mech are lightweight and solid choices.
Did I miss any foldable AR stocks? Do you have experience with one of these options? Tell us about it in the comments.
Justin Trump is the managing editor and owner of CAT Outdoors. The son of a Vietnam veteran, he’s an avid gun enthusiast and 2A advocate. He holds two firearm patents for the CAT M4 and Talon tools. When not managing CAT Outdoors, he enjoys spending time with his family and friends, rooting for Michigan sports teams, and serving his church.
![The 12 Best AR-15 Triggers Ranked [2024 Buyer’s Guide]](https://catoutdoors.com/wp-content/uploads/2023/08/hipertouch-24e-trigger-768x513.png)