I am looking for something that may or may not exist

[HoLeChit]

I dunno how comptible the upper would be with your PDW stock, but what about a BRN-180? They’re pretty cool too.

Brownells BRN-180® Line | Brownells

The new Brownells BRN-180® and BRN-180S® Gen2 upper receivers were designed in conjunction with PWS and FM Products to incorporate many improvements AR-15 creator Eugene Stoner made in the AR-18/AR-180 rifles originally introduced in the 1960s.

www.brownells.com

 

[Duncandl]

Adams Arms AR-15 Pistol PDW Tactical Elite A3 Gas Piston Upper

This Adams Arms Tactical Elite PDW Gas Piston Upper Assembly is chambered in 5.56x45mm NATO and comes ready to fire right out of the box after...

www.midwayusa.com

Just throwing that link out there, not sure but you might look at PWS as well, the only piston gun I’ve owned but its long gone.

 

[Duncandl]

Diablo:

Primary Weapons Systems MK107 Piston Upper (7.75" .223 Wylde Barrel)

Founded by a veteran, Wing Tactical finds the best tactical gun parts and accessories for AR-15s, Glocks, and other firearms so that you don’t have to.

www.wingtactical.com

Not sure what stock you could use for it.

 

[bushmaster06]

PSA Jakl has a long stroke gas piston and uses regular lowers, you need to buy their adapter for it though. F5 makes a SCAR lookalike stock for it too that it supposed be pretty kick ass if you're into folding stocks.

https://palmettostatearmory.com/psa-jakl-10-5-5-56-nato-1-7-nitride-complete-upper-with-bcg-bolt-catch-both-catch-roll-pin-odg.html

 

[kingfish]

Thanks for all the suggestions guys. So far some of the ideas you've given me are close to what I am looking for but not quite there. It's beginning to sound like what I want doesn't exist. The JAKL with the Sig MCX collapsible stock might be as close as I will get.

 

[O4L]

Thanks for all the suggestions guys. So far some of the ideas you've given me are close to what I am looking for but not quite there. It's beginning to sound like what I want doesn't exist. The JAKL with the Sig MCX collapsible stock might be as close as I will get.

From what little research I did on the subject after you posted yesterday I think you are correct. The Jakl upper was the first thing I thought of but I couldn't find one set up with the stock that you are wanting.

Good luck and keep us posted.

 

[JEVapa]

What @rc508pir said

All in all, the Sig Rattler (or what ever the eff they call it) is pretty much what youre discribing

Or some other Sig nonbuffer pistol/SBR.

Gas piston doesn't mean there's no buffer, it just means a heavier and more complicated operating system that functions differently. You want the recoil system in the upper which is what Sig does, they just happen to use gas piston operating systems.

 

[bushmaster06]

From what little research I did on the subject after you posted yesterday I think you are correct. The Jakl upper was the first thing I thought of but I couldn't find one set up with the stock that you are wanting.

Good luck and keep us posted.

Also with the Jakl, you cannot swap out for a shorter barrel, at least not easily as it’s riveted to a trunnion.

 

[bushmaster06]

Law Tactical also makes a BCG that doesn’t need a buffer tube.

Law Tactical ARIC

Fire folded repeatedly with the Law Tactical ARIC (AR Internal Carrier) The ARIC replaces the Complete Bolt Carrier Group and Recoil System of standard AR15 style firearms. ARIC (AR Internal Carrier) is designed to drop into your host firearm with the LAW Tactical Folder Stock Adapter (FSA).

www.lawtactical.com

 

[bigfug]

Stock options are limited as most will use the buffer tube for support. So you can use a shorter buffer tube using the DFA option listed below, and there are seveal others. You can also go MPX stock and and a picatinny adapter that replaces the buffer tube. You can then use a BRN180, JKL upper or any short barreled piston driven upper like the Adams Arms. LAW Tactical makes a modified bolt that lets you run any upper you want with no buffer. Evolution Systems does too but its backordered.

KNS AR-15 Buffer to Picatinny Rail Adapter Kit Flange

The KNS Precision AR/MCX Stock Adapter allows the user to mount a picatinny-style stock attachment (such as the SIG MPX folding stock or brace) in place...

www.midwayusa.com

MPX/MCX Stabilizer

Introducing the Strike Stabilizer for SIG MPX/MCX. Improve your pistol’s ergonomics and utility by combining the MPX/MCX mounting system and the Strike Industries patent-pending stabilizer design. Designed to work with the existing receiver cuts, the Stabilizer collapses to an extremely compact...

www.strikeindustries.com

DFA MCS - AR-Pistol Kit 2.5"

The DFA Modified Cycle System for your 9MM AR! Our MCS significantly shortens your AR profile while maintaining the quality needed for repeated fire.

deadfootarms.com

Uppers and bolts

Adams Arms AR-15 P2 Adjustable Gas Piston Pistol Upper Receiver

This Adams Arms P2 Adjustable Gas Piston Upper Assembly is chambered in 5.56x45mm NATO and comes ready to fire right out of the box after installation...

www.midwayusa.com

Law Tactical ARIC

Fire folded repeatedly with the Law Tactical ARIC (AR Internal Carrier) The ARIC replaces the Complete Bolt Carrier Group and Recoil System of standard AR15 style firearms. ARIC (AR Internal Carrier) is designed to drop into your host firearm with the LAW Tactical Folder Stock Adapter (FSA).

www.lawtactical.com