DOLOS AR15 Quick Detach Barrel

Status
Not open for further replies.
I like it. The lead shot idea is creative and functional. I could see having this in a quick access car safe, smaller vs rifle length. Not for every situation, but it could have a niche.

8" 300blk or 9mm with a sig brace would be a very tidy package.
 
A LAW folding stock adapter would be quicker, and you could get a least one shot off sooner.

But that completely ignores the situation that might exist, where a handgun at ready access would be up and firing long before any carbine or AR15 pistol could.

Taking it at face value, you get to the back of the vehicle, access your firearm in it's locked container, and pull it out. Which is faster? In this rough order:

1) a standard AR15 carbine locked and loaded ready to go.
2) an AR15 pistol with 12" barrel locked and loaded, ready to go.
3) an AR15 carbine or pistol with folding stock, locked and loaded, ready to go for one shot, and seconds later, for the magazine.
4) a broken down carbine or pistol with detached barrel, locked and loaded, that requires "a few minutes to assemble."

What we have is a $160 kit that allows you to quick detach the barrel, which is an expensive proposition not readily available for self defense purposes. That means it's really for a caliber change - which makes it a choice of 5.56 or .300BO, plus the few other wildcats using the GI cartridge. Other choices would require the use of a different bolt, and the QD attachment is no help there at all. Separated uppers with a bolt carrier equipped with the correct bolt is how that would work better.

I don't see this as a method to rely on for self defense when detached. It's simply one in a long string of QD barrel accessories that have come and gone on the market for decades. For those who want to change calibers, the downtime doing it isn't horrible, and the standard GI barrel nut works just fine. With the cost of uppers dropping, plus adding a handguard and sighting system that fits the cartridge, it's easier to swap complete uppers.

What remains to be explained to me is how the gas tube gets into the upper and inserted into the key if you are rotating the handguard. And what happens if someone is practicing speed drills to get their time down.
 
That is a great way to do an AR15 take-down. The way the bolt locks up with the barrel extension, the AR15 is almost begging for take-down flexibility.

Mike
 
Tirod,

I think it was Clint Smith that said something like the purpose of a handgun is to fight your way to a rifle. I know this is a little cliche-like, but that statement occurred to me when I saw this video. I think this could function well as a trunk gun. Compact and if kept in a pelican case, very well protected.
 
What we have is a $160 kit that allows you to quick detach the barrel, which is an expensive proposition not readily available for self defense purposes. That means it's really for a caliber change
What we have here is what they call the 'fallacy of the false dilemma' where we're presented with a choice of two mutually exclusive options when that's not necessarily the case.

Why not accept the product at its face value? A way to carry an AR in a manner that's as compact as possible while still being reasonably quick (I counted to 4 seconds in one video and 13 in another) to bring into action?

A LAW Folding Stock Adapter is going to have an lower/upper/barrel combined length of about 25 inches or so unless you separate the lower and upper/barrel and then you can drop about 2 inches off that. Can't be very discreet walking into a building with a 22" wide briefcase or racket bag. In the back of a car who'd care, but then you wouldn't need ultimate compactness in that case.

The Dolos QD system's only going to be about 17.5 end of gas tube to end of muzzle threads. Same length for a collapsed lower/stock combination. That looks about a good half foot shorter than a LAW stock adapter ($220) and about $50 cheaper with the Dolos at about ($170).

I guess it all depends on the mission... if the ability to shoot quickly is paramount then you need the bigger, more expensive package; but if you need concealment go with the shorter, less expensive one. As the demonstrator looked like he was using a Pelican 1450 case, I'd say he was looking at maximum concealability.

What remains to be explained to me is how the gas tube gets into the upper and inserted into the key if you are rotating the handguard. And what happens if someone is practicing speed drills to get their time down.
From watching this video, the barrel nut has a slot (cut in an arc) which allows it to rotate enough to engage the lugs on the part that's attached to the upper receiver. They do say you should exercise care when inserting the tube into the receiver.

I'd say it's a reasonably nice system, although I wish it would play better with other tubes or if they'd modify it to accept either M-Lock or KeyMod. The lack of a positive lock to prevent the handguard from rotating bothered me at first, but this isn't a battle rifle, it's a specialized niche system.
 
Last edited:
I personally like the gun as a back packing/hiking/ camping gun, with the added benifits of not having a long gun case in your car or truck if thats where its gonna live. As a day to day walking around gun, a pistol is perfect.
 
Since the point IS to use your pistol to fight to get to your rifle, then why make it any worse than necessary? Speed of deployment being paramount, what is better, a gun that can work straight out of storage, or one that requires some time spent getting it into action?

The folding stock AR15 pistol can be carried loaded inside a vehicle, a rifle, even broken down, is often required to be in a locked case with ammo stored separately. I didn't make that distinction in my comparison. When you are ducking for cover and attempting to retrieve it, which is better?

Hiking on a trail, you encounter a cub and discover you are between it and it's mother, or you glimpse a cougar stalking you up the hillside. Which is better, a loaded AR15 carried on a sling, or your takedown rifle neatly stored in your pack?

What is it about assessing the risk and accepting you need a rifle, but then trying to cover up you have it? In the great outdoors it's no big deal. What I'm reading is an attempt to hide it for social reasons, not tactical.

Like I said, these have been on the market before and there doesn't seem to be enough business to sustain it. It's a small niche of users who apparently aren't repeat buyers and certainly haven't convinced many to jump on the bandwagon. Take downs aren't uncommon, but even the firearms makers tend to limit them to just a few offerings for a short duration. Kind of like short bed pickups, everybody thinks they are cute, but don't really rely on them to do any major work. That's why we don't see standard sniper rifles issued to the various armies in takedown mode. They apparently can't benefit from it.

Here's an alternative - clamp a round tube free float to the barrel nut and keep it short enough to get to the gas block. Cut away enough of the barrel nut teeth to clear the tube when hand tightened. Use thumbscrews to clamp the block to the barrel.

Install barrel, tighten hand guard, slip gas block down, tighten thumbscrew, shoot. A take down that doesn't cost an arm and a leg. The barrel nut torque isn't 60 foot pounds, it's a minimum of 25, that's hand tight. The nut tooth is to keep it from loosening up under combat stress over months of action - that's not a high country hike. The gas block seats against the shoulder on the barrel and the set screw fits into a drilled dimple. Five minutes with a grinder and the properly threaded screw and I could fix up my Apex Gator Grip 6.8. It would take longer to shop for the thumb screw than do the work. I'm not going to bother, post up how it worked for you and tell us you saved $160.

Oh, wait, sorry, it doesn't have a Brand and therefore isn't Cool. And yet it does the same thing. If it sounds too hillbilly then maybe the point isn't about being a takedown, it's about buying something to reflect on someones social status, I Have One and You Don't. That is the #1 selling point of most aftermarket AR15 products anyway.

Vets and the Army both know that the standard GI rifle is plenty good enough, it's the people who don't rely on it for literal life and death who tend to "improve" it.
 
I suspect that at some point the idea of 'easy reassembly within a reasonable time' came to the mind of the inventor(s) and engineering a system that didn't require repeated turning of thumbscrews and handguards. Sure it's cheaper, but there's 'within a reasonable time' to consider as well. A simple quarter-turn hits the 'easy' and 'reasonable time' marks with remarkable ease.

If it hadn't then the Dolos kit would be a barrel nut wrench and a punch for the gas tube pin. That's about as cheap as it gets.
 
Since the point IS to use your pistol to fight to get to your rifle, then why make it any worse than necessary? Speed of deployment being paramount, what is better, a gun that can work straight out of storage, or one that requires some time spent getting it into action?

Again, you've quite neatly demonstrated another logical fallacy; this one is called the 'straw man'. In it you offer a condition (the straw man) and then proceed to soundly defeat a condition that only you have proposed.
Properly expressed, it would be "IF speed of deployment were paramount what would be better ....? "
And the answer would be a fully assembled and loaded rifle, already shouldered not being carried in any sort of container.

However, such is not the case presented. In this case, we have a rifle being transported in such a manner that it's not readily apparent that a long arm is present. In this case, we have a situation where concealability is more important than speed.
Such is often the case in reality, else everyone would be carrying openly and there would be no concept of concealed carry as when 'speed is paramount' a concealed weapon can't be deployed as quickly as one carried openly.
 
carbine85 said:
I like the concept, but it looks like you could accidentally disconnect the barrel. The quick twist release is worrisome to me.
The same thought occurred to me, and it would be nicer if there was some sort of positive lock to prevent the handguard from accidentally turning.
But then I thought, 'ya know, this isn't really a rifle where you're going to be busting through a basic load of ammo from. It's made to pack in (discreetly), do it's thing, and then get out, not for a sustained firefight. This in an over-the shoulder bag could go just about anywhere without attracting unwanted attention like a collapsible stock AR slung over the shoulder or carried in a sporting bag would.
 
It seems about 10% of the vids and pictures I see anymore that show someone bringing their AR out from their carry bag or case, they've got the pins pushed out and transport it broken into lower and upper. It really is simplicity itself to pop it apart and back together again.

This idea is neat, but sure doesn't seem to save much time or space...
 
It seems about 10% of the vids and pictures I see anymore that show someone bringing their AR out from their carry bag or case, they've got the pins pushed out and transport it broken into lower and upper. It really is simplicity itself to pop it apart and back together again.

This idea is neat, but sure doesn't seem to save much time or space...

Tim at Military Arms shows how much space it saves.

http://www.youtube.com/watch?v=5cuJXyV29MU&t=9m36s
 
Sure. It would save about 4" give or take, no matter what barrel you have on it. Not quite the full length of the upper receiver itself.

That's maybe really critical, but it would be up to the user to decide if it is $170 worth of critical.
 
"... about 4 inches, give or take."
Um, how do you figure that? Are we using the same measuring system?

Maybe we're looking at different AR upper receivers, but from eye-balling it, it saves the length of the upper receiver (8-inches) minus the amount the gas tube extends past the chamber (1.5 or so). Back of the napkin math says that's pretty close to half a foot. Half a foot is the difference between something able to fit in an average briefcase or slung bag and something suspiciously large.

It's enough that you can have a compact package (sub-19" certainly as I have a longer than standard flash hider on my barrel) without having to go the SBR route.

Today, one could easily pretend they have a pistol instead of an SBR'd rifle by merely using a SIG arm brace and use a ridiculously short barrel if desired. As some point, the lower+buttstock becomes the deciding factor instead of the upper+barrel assembly.
 
Last edited:
Ok, I just put a scale on some parts around here. Receiver is 7-1/2" long, barrel extension is 1-1/2" so yup, that's 6" you lose with this kit. (6" is 2" more than 4", if you want to check my measuring system.)

Worth $170 and proprietary handguard?

As I said, totally up to the end user to decide. For a "must have" situation, you have to very deeply desire to tote that rifle in a specific case, bag, or box that is no more than 6" too short for your barreled upper.

Some folks would find that very useful. I'd probably choose to make different arrangements so that I could use the handguards/tube I wanted, and save the money -- but that's just my opinion.
 
It all depends on one's needs, I have a FN PS90 that's a stinkin' 1/4 inch too long to put in the briefcase that I'd like to put it in. If I want it to fit I have to separate the barrel assembly from the stock. It's doable as there is no loss of zero, but it's not as secret squirrel fancy as it could be.

I went and got a used sports bag, but there's a certain incongruity about an overweight old guy in a suit carrying a racket bag around over his shoulder. It's dang suspicious, really.

The Dolos system is all about concealability at the least cost to efficiency. I'd say that it does a pretty good job with noted deficiency of no way to positively lock the QD barrel. Every other system mentioned has been both more expensive and longer, the thing this system seeks to avoid.
 
...but there's a certain incongruity about an overweight old guy in a suit carrying a racket bag around over his shoulder. It's dang suspicious, really.

:D Reminds me of Jim Gaffigan's line about how every time he walks into a sports store to buy workout clothes he feels like the store clerks are looking at him like, "Uh...the restrooms are for our paying customers only, pal!"
 
but there's a certain incongruity about an overweight old guy in a suit carrying a racket bag around over his shoulder. It's dang suspicious, really.

Thanks for the laugh, 4th.

What I'm reading is an attempt to hide it for social reasons, not tactical.

Why is this a problem? Isn't this true of concealed carry too.

But I also think in the function of a trunk gun, if stored in a Pelican case like the video demonstrates (with a tool sticker), this offers a certain sense of camouflage. No one pays attention to it as they walk by your open trunk. Many people would notice a rifle case. Less likely to become an target of opportunity for thieves? Maybe this a small chance, and maybe there are equally good solutions to that possibility for less money, but I still find it intriguing.
 
there's a certain incongruity about an overweight old guy in a suit carrying a racket bag around over his shoulder. It's dang suspicious, really.

That would be me. After the terrorist stuff started there were concerns about 'soft targets' in the US. I worked for many years in one. No weapons allowed, of course. (You have to love that 'Victim Rich Environment' thinking.)

The Dolos system, as well as some others, would have made it possible to carry a real AR pistol or even SBR in a very convenient, and urban acceptable, package and allow it to be put together quickly if needed. A tennis racket case just wouldn't have made the grade.
 
Its fine as a takedown hunting/plinking rifle. On a combat weapon, it looks to be a very bad idea. One accidental twist on the handguard and your barrel falls off..... No thanks. Trip or fall down, handguard twists, barrel falls off. Nope,nope,nope. Until they add a sturdy spring loaded push button detent as a failsafe, (some other similar setup) I'd never be interested.
 
I'd take the MGI Hydra over that, and I did. The barrel lockup is a lot better in my opinion, and just as quick. I've put a number of rounds in a few different calibers through mine with no issues, and it provides the added advantage of changing to non-5.56 based calibers and magazines easily.
 
I doubt if anyone considers the system to be compatible with a long term combat environment. Maybe a few rounds, but for real combat? Nawww.
 
Status
Not open for further replies.
Back
Top