AR people, I have a question

[RifleBowPistol]

I want to know how this deal is supposed to work? Is this to make your AR Biden compliant or what the hell? Sure looks like this is going to make an AR into a single shot. You would have to push the rear receiver pin out, open the gun, then open the bolt, load a round in the chamber, close the bolt, close the receiver and push the receiver pin back in place. Then the gun could be fired, but the bolt won't be able to travel back much at all, definitely not enough to eject the round.

I have found multiple of these, listed, but no info on how they are supposed to work. They are listed as being for AR 15s, I have seen some that also listed a special buffer tube that attaches to the dove tail. Those really have to be a joke.

https://www.midwayusa.com/product/1022440015?pid=386407

[fish4food]

Made for firearms where the buffer does not go behind the attachment point.

Gives descriptions on applicable uses and firearms not to be used on: AR platform or Sig MCX

[Clay C]

They are for piston guns that don’t require a buffer tube. The picatinny is for attaching a folding stock.

[RifleBowPistol]

They are for piston guns that don’t require a buffer tube. The picatinny is for attaching a folding stock.

I guess I am going to have to look up a piston rifle. I would think the bolt assembly would still be close to the same length as a gas gun. I have seen pieces to build piston ARs, but I guess I did not look closely enough. The parts did not look that different. I would think there would still need to be a spring behind the bolt to slow it down and return it forward. Which would mean the bolt/bolt carrier would have to be very short.

I went and pulled one of my ARs out today, just to make sure of what I thought I was sure of. And sure enough the bolt carrier extends all the way back to the front of the buffer, I think it is about flush with the rear of the receiver.

In my reading, I found a bunch of info, saying no it won't work for your application. Then found one response that said, yes, it would work for a 22 LR gun. But the kit was listed for AR15, along with the others that I saw like this one.

I will start researching gas piston AR parts, and see if a gas piston bolt, looks like it would work with this conversion. I don't plan on buying one, I just want to see parts that would allow this to work, reliably. I could see with a handgun caliber, where the bolt would not need to travel as far rearward, and being a blow back design. I can easily see someone making a blow back pistol caliber bolt that would work with this conversion. I am having trouble believing there are 5.56 or 300 Blackout bolts that would work with this conversion. The bolt would have to be very short. The recoil spring would almost have to be mounted forward of the receiver, such as the rear end of the gas piston. I don't see how you could put a spring behind a bolt, and have enough room for the bolt and spring.

[Anon]

I guess I am going to have to look up a piston rifle. I would think the bolt assembly would still be close to the same length as a gas gun. I have seen pieces to build piston ARs, but I guess I did not look closely enough. The parts did not look that different. I would think there would still need to be a spring behind the bolt to slow it down and return it forward. Which would mean the bolt/bolt carrier would have to be very short.

I went and pulled one of my ARs out today, just to make sure of what I thought I was sure of. And sure enough the bolt carrier extends all the way back to the front of the buffer, I think it is about flush with the rear of the receiver.

In my reading, I found a bunch of info, saying no it won't work for your application. Then found one response that said, yes, it would work for a 22 LR gun. But the kit was listed for AR15, along with the others that I saw like this one.

I will start researching gas piston AR parts, and see if a gas piston bolt, looks like it would work with this conversion. I don't plan on buying one, I just want to see parts that would allow this to work, reliably. I could see with a handgun caliber, where the bolt would not need to travel as far rearward, and being a blow back design. I can easily see someone making a blow back pistol caliber bolt that would work with this conversion. I am having trouble believing there are 5.56 or 300 Blackout bolts that would work with this conversion. The bolt would have to be very short. The recoil spring would almost have to be mounted forward of the receiver, such as the rear end of the gas piston. I don't see how you could put a spring behind a bolt, and have enough room for the bolt and spring.

You would need a whole new complete upper...probably one of the best designs these days is the sig mcx virtus/rattler, they make upper receiver kits that will fit on any mil spec lower.

[M16]

You missed this part.

Which brands of uppers is this compatible with?
Asked by George 2 years ago
Add your answer
Open Reply - ARmedinNY
BRN -180S, Sig 556, .22LR...short stroke gas piston systems

[Tony Pic]

Certain calibers in the AR configuration can work in a blowback fashion. The bolt just blows back and spring(s) handle the recoil without the need for a buffer tube. Usually pistol/22lr calibers because the bolt throw is so short and the powder charge is small compared to a rifle round.
If you are ever in Fredricksburg. Stop in at KNS Precision. They make that part and would be more than happy to explain. The best lil gunshop in Texas.

[Drycreek3189]

I want to know how this deal is supposed to work? Is this to make your AR Biden compliant or what the hell? Sure looks like this is going to make an AR into a single shot. You would have to push the rear receiver pin out, open the gun, then open the bolt, load a round in the chamber, close the bolt, close the receiver and push the receiver pin back in place. Then the gun could be fired, but the bolt won't be able to travel back much at all, definitely not enough to eject the round.

I have found multiple of these, listed, but no info on how they are supposed to work. They are listed as being for AR 15s, I have seen some that also listed a special buffer tube that attaches to the dove tail. Those really have to be a joke.

https://www.midwayusa.com/product/1022440015?pid=386407

Gonna have to take the “Rifle” out of your screen name…

[RifleBowPistol]

You would need a whole new complete upper...probably one of the best designs these days is the sig mcx virtus/rattler, they make upper receiver kits that will fit on any mil spec lower.
[ATTACH]1100584[/ATTACH]

Ok, so there is the answer. I tried to imagine how this would work. I kept coming up with some greatly different bolt and return spring design had to be used.

[RifleBowPistol]

Certain calibers in the AR configuration can work in a blowback fashion. The bolt just blows back and spring(s) handle the recoil without the need for a buffer tube. Usually pistol/22lr calibers because the bolt throw is so short and the powder charge is small compared to a rifle round.
If you are ever in Fredricksburg. Stop in at KNS Precision. They make that part and would be more than happy to explain. The best lil gunshop in Texas.

Even the pistol caliber ARs typically are built on a AR15 based lower and have a bolt carrier that is the same length as a common AR15 bolt carrier, most of them don't have the bolt that slides and rotates within the bolt carrier. Most are one piece blow back design, but there are some companies that build pistol caliber bolt carriers and bolts that are of the same rotational bolt design as a common AR15. The reason, I have learned from reading lately, is to slow the bolt down. Seems the blow back design bolts blow back, hit the rear end of the bolt travel, then back forward to battery, so fast that many triggers have trouble setting, causing the hammer to drop. So they make special heavy blow back bolts, heavy pistol caliber buffers and stiffer buffer springs. If you read info posted by common blow back bolt carrier manufactures, they will tell you to use common Mil spec triggers to insure the triggers properly reset.

I have been getting into the pistol caliber AR stuff for a few years now. Once I figured out you could get a AR in 10mm I had to have one. Four years ago, there was very few parts, much fewer were actually in stock for a 10mm AR. But in the last two years, 10mm AR parts are becoming much more common. I have been doing a lot of reading on AR pistol caliber parts and what works with what. Then I like JP Enterprises buffer kits, I have those in all of my ARs. I read info in a couple of adds for JP Enterprises buffer kits saying that particular kit would not work for a AR9. So I got on JP Enterprises web site and started looking for pistol caliber buffer kits, they have them. They list them as AR9 parts, turns out they make a short travel buffer kit because a bolt in a pistol caliber gun will not need to travel as far to eject and pick up the next round, as a rifle caliber bolt. So they make special short travel buffer kits, bolt, and all types of other parts, primarily for competition AR9s. They only make 9mm bolts and barrels, no 10mm or 45ACP. From what I have read, their buffer kits, slow the bolt down enough to make it work with at least some drop in trigger assemblies. From what I am reading, it sounds like their stuff works good enough you can use any AR15 trigger assembly with their buffers and bolts. But I still plan to buy a AR9 specific drop in trigger, just to make sure, everything works like it should. But plan on buying some other triggers to see how well those will work with the JP Enterprises bolt and buffer kit. I am going to do both a AR45 in 10mm and a AR9, in 9mm. I figure I would be able to shoot a AR9 a lot more, and should be cheaper, easier to find ammo. The AR9 triggers will work with the AR45 pieces. I will use the common pistol caliber buffer kit in the 10mm and the short travel buffer kit and JP bolt in the 9mm.

But having started buying some of these parts, and having looked at a lot of parts, I know that most of the pistol caliber guns use a bolt that is the same length as a AR15 bolt, I am pretty sure even the JP Enterprises short travel bolt, is the same length as a common AR15 bolt. I think they machined the bolt differently, so the bolt catch will catch the bolt, when it's just far enough back to hold the bolt open for a pistol caliber.

There are a bunch of different design parts out there for AR bases guns, I know I have not seen them all, but I did not on my own find bolts and related parts that would work with these dove tail kits that screw into the receiver where the buffer tube would normally go. I have not looked up 22 LR bolts and related parts. I may do a 22 LR AR at some point, if so I will do a lot of reading and research on 22 LR parts.

[RifleBowPistol]

Gonna have to take the “Rifle” out of your screen name…

Yeah, yeah.
I know most rifles pretty well, but don't know them all. Then the aftermarket comes up with new parts, before I learn what has existed. There are so many companies making AR pieces, with so many different designs, it is very hard to keep up. At the same time, there are probably hundreds of guns that have been out of production for a long time, that I don't know much about. So there is not going to be a few tons of aftermarket variations for those guns, but I still don't know much if anything about those guns. As I discover them I some times try to learn about them, if I find them interesting.

[sierracharlie338]

A 10mm ar pistol would be awesome!

Check out LWRC or PWS for piston guns. Both are superb.


Sierracharlie out....

[Mike D]

A 10mm ar pistol would be awesome!

Check out LWRC or PWS for piston guns. Both are superb.


Sierracharlie out....

Don’t need no stinkin’ pistol.




Sent from my iPhone using Tapatalk Pro

[sierracharlie338]

AR people, I have a question

Don’t need no stinkin’ pistol.




Sent from my iPhone using Tapatalk Pro

Ooooo look at Mikey with a beauty SBR. Me likey...

I really want to touch it..... [emoji23]


Sierracharlie out....

[Mike D]

Ooooo look at Mikey with a beauty SBR. Me likey...

I really want to touch it..... [emoji23]


Sierracharlie out....

Lol. [emoji1787]


Sent from my iPhone using Tapatalk Pro