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3/4/2026 8:21:05 PM EDT
[#1]
My second CARL is not functioning properly in the A4 clone, and again it was too cold and windy to stand around diagnosing. I'm shelving these until spring.

This time I fired 2 rounds in semi auto mode, then switched over to burst, and fired 2 rounds (presumably) to the reset. I pulled the trigger again, and got 2 rounds, then a dead trigger on a live round. Maybe I need to bump up the weight in the rifle length buffer, I'm not sure. That rifle length gas system with no can makes for an amazingly long cyclic time.
3/4/2026 11:07:14 PM EDT
[#2]
Quote History
Originally Posted By ELittlefield:
My second CARL is not functioning properly in the A4 clone, and again it was too cold and windy to stand around diagnosing. I'm shelving these until spring.

This time I fired 2 rounds in semi auto mode, then switched over to burst, and fired 2 rounds (presumably) to the reset. I pulled the trigger again, and got 2 rounds, then a dead trigger on a live round. Maybe I need to bump up the weight in the rifle length buffer, I'm not sure. That rifle length gas system with no can makes for an amazingly long cyclic time.
View Quote


Sucks man. I'm taking mine out tomorrow for the first time. 16" carbine, with multiple buffer weights in the range bag.


Stolen Firearm: Colt AR15, Serial # SP342380, 16" carbine. Stolen in California by Kevin Ayres, and taken to Missouri.
3/5/2026 10:54:10 PM EDT
[#3]
Is anyone else’s take up super spongy?

It’s not the worst milspec trigger pull I’ve experienced, but it’s close.
If you aren't representing Jesus in a way that makes people want to hang out with you, you're doing it wrong.
3/6/2026 12:03:57 AM EDT
[#4]
Took Carl to the desert today for a test run. No issue in Semi. Burst mode, I get 3rds, then the trigger won't pull. The disconnector is getting stuck on that cam reset. Open the upper and the disconnector is sticking. Just tapping the hammer, it comes off the cam, close the upper, 3rds, dead. Wash, rinse, repeat. I'll probably try and smooth out that spot on the cam before I take any material off the disconnector.



Stolen Firearm: Colt AR15, Serial # SP342380, 16" carbine. Stolen in California by Kevin Ayres, and taken to Missouri.
3/6/2026 12:24:33 AM EDT
[Last Edit: bkpkr][Edited] [#5]
[deleted]
3/6/2026 3:54:55 PM EDT
[#6]
In stock, now: https://stincusa.com/product/cam-activated-reset-limiter-for-super-safeties
3/7/2026 2:25:56 PM EDT
[Last Edit: HKH][Edited] [#7]
Quote History
Originally Posted By ELittlefield:

2 videos on this page. A slave pin is very useful for the trigger and disconnectors.

https://stincusa.com/product/cam-activated-reset-limiter-for-super-safeties
View Quote


Bruh

I gotta say I was a hater at first but said I’d order one.  Took me 2 mins to install (use a slave pin, don’t mess around with pliers like that video).  

Slapped it in a really embarrassing FRANKEN Badger side charger (yall don’t hate on my actual HB brace mods to take a carbine buffer tube and to fit an M4 receiver not a Q one.  Home built H2.75? (As much as I could shove in that Q shorty buffer).

I’ll say the paint job is incredible thanks to our fellow member Thor!  Y’all call him if you need anything Cerakote related. He painted the upper, handguard and red dot mount not the optic.  That’s my rattle can job

This thing rips.  Three round after three round with zero miscounts or failures with the four mags I just tried.  

I’ll tell you having a PTR vent 1 makes a SBR 5.56 hearing safe and cuts down on nosey land owners

I’ll say it , I’m a fan of CARL.

3/7/2026 3:34:53 PM EDT
[#8]
I was told after asking specifically if this would work with a $eissle trigger That it would. So I bought one and it will NOT work with a G trigger, The disconnector will not fit in the trigger. Looks like it could be ground down to fit but more work than I'm willing to do. Not giving up my 2lb 2 stage trigger.
3/7/2026 4:13:11 PM EDT
[#9]
Quote History
Originally Posted By HKH:


Bruh

I gotta say I was a hater at first but said I’d order one.  Took me 2 mins to install (use a slave pin, don’t mess around with pliers like that video).  

Slapped it in a really embarrassing FRANKEN Badger side charger (yall don’t hate on my actual HB brace mods to take a carbine buffer tube and to fit an M4 receiver not a Q one.  Home built H2.75? (As much as I could shove in that Q shorty buffer).

I’ll say the paint job is incredible thanks to our fellow member Thor!  Y’all call him if you need anything Cerakote related. He painted the upper, handguard and red dot mount not the optic.  That’s my rattle can job

This thing rips.  Three round after three round with zero miscounts or failures with the four mags I just tried.  

I’ll tell you having a PTR vent 1 makes a SBR 5.56 hearing safe and cuts down on nosey land owners

I’ll say it , I’m a fan of CARL.

https://www.ar15.com/media/mediaFiles/99571/IMG_1111-3725186.jpghttps://www.ar15.com/media/mediaFiles/99571/IMG_1112-3725187.jpg
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By HKH:
Originally Posted By ELittlefield:

2 videos on this page. A slave pin is very useful for the trigger and disconnectors.

https://stincusa.com/product/cam-activated-reset-limiter-for-super-safeties


Bruh

I gotta say I was a hater at first but said I’d order one.  Took me 2 mins to install (use a slave pin, don’t mess around with pliers like that video).  

Slapped it in a really embarrassing FRANKEN Badger side charger (yall don’t hate on my actual HB brace mods to take a carbine buffer tube and to fit an M4 receiver not a Q one.  Home built H2.75? (As much as I could shove in that Q shorty buffer).

I’ll say the paint job is incredible thanks to our fellow member Thor!  Y’all call him if you need anything Cerakote related. He painted the upper, handguard and red dot mount not the optic.  That’s my rattle can job

This thing rips.  Three round after three round with zero miscounts or failures with the four mags I just tried.  

I’ll tell you having a PTR vent 1 makes a SBR 5.56 hearing safe and cuts down on nosey land owners

I’ll say it , I’m a fan of CARL.

https://www.ar15.com/media/mediaFiles/99571/IMG_1111-3725186.jpghttps://www.ar15.com/media/mediaFiles/99571/IMG_1112-3725187.jpg

Glad to hear it runs! Thor koted the can and scope mount on this rifle:

" />
3/7/2026 4:14:12 PM EDT
[#10]
Quote History
Originally Posted By Ddkroetz:
I was told after asking specifically if this would work with a $eissle trigger That it would. So I bought one and it will NOT work with a G trigger, The disconnector will not fit in the trigger. Looks like it could be ground down to fit but more work than I'm willing to do. Not giving up my 2lb 2 stage trigger.
View Quote

Who told you it works with a G$ trigger? It's a completely different type of trigger. Mil spec and mil spec adjacent.
3/8/2026 4:09:37 PM EDT
[#11]
Whoever replied to my question from the factory. I think his name is Benjamin. He said that it would work you just have to use their hammer. Not even close.
3/8/2026 7:30:31 PM EDT
[#12]
At the range in Dickinson, FRTs were a thing today.  But, the CARL was not expected.

Some stranger spit a consistent 3 rounds per pull across multiple mags.  Had to be a CARL.  I was jealous.

I was confirming my x39 ARs.  I could appreciate a 3 rd limiter on'm.  4th+ rounds were bad shots.

Color me mildly interested and impressed.
3/8/2026 8:09:58 PM EDT
[#13]
I ordered two mistakenly and both are exceptional.  I have one on a super safety as I posted earlier and another in a shorty with the Atrius.  Works like a champ.  This thing is cool but it will never be in my tier 1 guns as it is incompatible with a Geissele.
3/11/2026 11:31:03 AM EDT
[#14]
I ordered one for my early GWOT A2, we'll see how it works
Taxation without representation
3/11/2026 11:35:40 AM EDT
[Last Edit: 545Fan][Edited] [#15]
But why?  I always thought the military going to burst was a solution to poor training to begin with.  As in "We just can't keep Joe from blasting all his ammo donwrange, so we'll create a mechanical device that will only let him shoot bursts."

No thanks, but to each his own.
3/11/2026 11:52:17 AM EDT
[#16]
Originally Posted By 545Fan:
But why?  I always thought the military going to burst was a solution to poor training to begin with.  As in "We just can't keep Joe from blasting all his ammo donwrange, so we'll create a mechanical device that will only let him shoot bursts."

No thanks, but to each his own.
View Quote


Exactly. If I had an A2 20” other than my early 90s Colt with the stupid sear block I might consider a 3 round burst for nostalgic reasons but otherwise, not interested.

NRA Life Member

I can see where you're coming from, 'cause I know where you've been and I can see where you're going 'cause I can see the direction you're headed in. I just don't know where the hell you're at right now.

3/27/2026 1:47:02 PM EDT
[#17]
Hopefully some of you smart people can help me figure this out.

80% lower. Works 100% with all "mil-spec" FCG.

Installing Cornfed MARC and CARL at the same time.

Op check MARC seems to work fine with standard safety and hammer.
Put in CARL components, no joy.

Hammer will lock back on disconnect, let go of trigger I can see the disconnect release the hammer. Trigger is now dead. Hammer back, minor trigger movement. I can reengage the disconnects.

Pulled the CARL disconnects (2 parts and spring), reinstalled original disconnect with the CARL hammer. Functions normally.

This is all bench test with no upper.

Any ideas?
3/28/2026 5:43:27 PM EDT
[#18]
All right boys, I had a 2 hour range/workshop session this afternoon. A lot of good, some not so good. Both of these use Cornfire MARCs, both use GI type trigger shoes.

My first CARL: it had both disconnectors replaced by Stuff and Things, which improved the function slightly, but I was still consistently having issues with it occasionally failing to complete a burst. That seems to have been entirely cured, by taking a benchtop wire wheel to the sharp edges left on the disconnectors by the stamping process. It now seems to function perfectly, at least through 3x30 magazines. I was using a suppressed 14.5 upper today, out of courtesy to my neighbors, but the ultimate goal is to have this be an A2 carbine. Anyway.

The second CARL is in an M16A4 clone. No joy with this one. Constant light strikes on the first round. I ran out of ammo, but my next step is to swap BCGs, and then the step after that is to install a 7.62x39 XL firing pin. If it's still not working after that, I think I'll reach out to Stuff and Things.
3/28/2026 5:49:06 PM EDT
[#19]
Quote History
Originally Posted By maggiethecat:
Hopefully some of you smart people can help me figure this out.

80% lower. Works 100% with all "mil-spec" FCG.

Installing Cornfed MARC and CARL at the same time.

Op check MARC seems to work fine with standard safety and hammer.
Put in CARL components, no joy.

Hammer will lock back on disconnect, let go of trigger I can see the disconnect release the hammer. Trigger is now dead. Hammer back, minor trigger movement. I can reengage the disconnects.

Pulled the CARL disconnects (2 parts and spring), reinstalled original disconnect with the CARL hammer. Functions normally.

This is all bench test with no upper.

Any ideas?
View Quote

First thing, I would try their recommended "flick" break in period for about 100 times, maybe more. Second thing, try polishing the sharp edges of the disconnectors.
3/28/2026 7:09:58 PM EDT
[#20]
This seems like a lot of trouble for something that seems kind of unreliable based on my understanding of the range reports I’m seeing.
3/28/2026 7:11:25 PM EDT
[#21]
Quote History
Originally Posted By Powerkicker:
This seems like a lot of trouble for something that seems kind of unreliable based on my understanding of the range reports I’m seeing.
View Quote

I certainly won't try to convince you otherwise. They're not reliable, or drop in at the moment. I'm sincerely hopeful that they will come to be in the near future.
3/28/2026 7:44:58 PM EDT
[Last Edit: HKH][Edited] [#22]
My two worked out of the box 🤷‍♂️.  It’s hit and miss on all these FRT things.  My arcs were out of spec but now after they replaced it’s my favorite frt in combo with a G$.

The Carl is in two totally different platforms.  One is a HB clone in 300 with an Atrius and an homemade function flatbow and the other is a side charging 556 beast with a Hoffman.  Both haven’t had a hiccup.  Granted I’ve only shot about 4 mags through each just to ensure proper function.

That’s the problem with having so many frts you shoot them just enough to ensure they work and then move on to the next
3/28/2026 7:46:49 PM EDT
[#23]
Quote History
Originally Posted By HKH:
My two worked out of the box 🤷‍♂️.  It’s hit and miss on all these FRT things.  My arcs were out of spec but now after they replaced it’s my favorite frt in combo with a G$.

It’s two totally different platforms.  One is a HB clone in 300 and the other is a side charging 556 beast.  Both haven’t had a hiccup.  Granted I’ve only shot about 4 mags through each just to ensure proper function.

That’s the problem with having so many frts you shoot them just enough to ensure they work and then move on to the next
View Quote

3/28/2026 7:48:01 PM EDT
[#24]
Seriously, apart from my AR22, I don't shoot FRTs for fun. I shoot each combination enough to ascertain reliability, then move on the the next one.

I need an ammo sponsor.
3/28/2026 8:18:36 PM EDT
[#25]
Quote History
Originally Posted By ELittlefield:
Seriously, apart from my AR22, I don't shoot FRTs for fun. I shoot each combination enough to ascertain reliability, then move on the the next one.

I need an ammo sponsor.
View Quote

You and me both, brother.
3/28/2026 8:41:55 PM EDT
[#26]
Quote History
Originally Posted By Powerkicker:
This seems like a lot of trouble for something that seems kind of unreliable based on my understanding of the range reports I’m seeing.
View Quote

My problems were user error, once I figured out what I was doing it’s been flawless.

The trigger pull kind of sucks, but I’ve heard burst trigger pull sucks so clone correct™
If you aren't representing Jesus in a way that makes people want to hang out with you, you're doing it wrong.
3/28/2026 10:56:00 PM EDT
[Last Edit: maggiethecat][Edited] [#27]
Quote History
Originally Posted By ELittlefield:

First thing, I would try their recommended "flick" break in period for about 100 times, maybe more. Second thing, try polishing the sharp edges of the disconnectors.
View Quote



@ELittlefield

flick break in period?  I dont find anything on their website about troubleshooting so apologies if it's there.
would that mean pull hammer back onto disconnect, then disassemble (pull hammer pin, pull hammer part way out) so I can put hammer forward, reassemble and repeat 100x ?

EDIT:
now on their videos page I see "function fix" I see if that helps.

thanks
3/28/2026 11:02:13 PM EDT
[#28]
Quote History
Originally Posted By maggiethecat:



@ELittlefield

flick break in period?  I dont find anything on their website about troubleshooting so apologies if it's there.
would that mean pull hammer back onto disconnect, then disassemble (pull hammer pin, pull hammer part way out) so I can put hammer forward, reassemble and repeat 100x ?

View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By maggiethecat:
Originally Posted By ELittlefield:

First thing, I would try their recommended "flick" break in period for about 100 times, maybe more. Second thing, try polishing the sharp edges of the disconnectors.



@ELittlefield

flick break in period?  I dont find anything on their website about troubleshooting so apologies if it's there.
would that mean pull hammer back onto disconnect, then disassemble (pull hammer pin, pull hammer part way out) so I can put hammer forward, reassemble and repeat 100x ?




The Rumble ads suck, but this is the troubleshooting that they recommend.
3/28/2026 11:16:48 PM EDT
[#29]
I went found that, edited before seeing your post.
appreciate the help
4/10/2026 12:06:04 PM EDT
[#30]
Absolute success in my A4 clone! I bought an enhanced firing pin from Black Rifle Arms, designed for 7.62x39 and 5.45x39. I first did single fire, to check that it wasn't piercing my primers, and then tested it out in 3 round burst. Perfect function, ZERO light strikes. I am one happy camper. So to sum up, I have 2x CARLs. My first one is going in an A2 carbine build, for which I just ordered a 10.5 barrel. It was occasionally bursting two rounds, and then had a dead trigger. It required the two disconnectors to be deburred around the edges, to eliminate the sharp bits where the stamping machine left slight burrs. It now functions perfectly.

The second one I bought is in this A4 clone. It was simply not igniting primers on the first round. The hammer spring seems to be right on the edge of powerful enough, which makes some sense, being a single leg spring. The fix was to install an enhanced firing pin.

I'm delighted that my two AR lowers which have "Burst" markings on them, now actually burst fire.

" />
4/10/2026 6:01:26 PM EDT
[#31]
Quote History
Originally Posted By ELittlefield:
Absolute success in my A4 clone! I bought an enhanced firing pin from Black Rifle Arms, designed for 7.62x39 and 5.45x39. I first did single fire, to check that it wasn't piercing my primers, and then tested it out in 3 round burst. Perfect function, ZERO light strikes. I am one happy camper. So to sum up, I have 2x CARLs. My first one is going in an A2 carbine build, for which I just ordered a 10.5 barrel. It was occasionally bursting two rounds, and then had a dead trigger. It required the two disconnectors to be deburred around the edges, to eliminate the sharp bits where the stamping machine left slight burrs. It now functions perfectly.

The second one I bought is in this A4 clone. It was simply not igniting primers on the first round. The hammer spring seems to be right on the edge of powerful enough, which makes some sense, being a single leg spring. The fix was to install an enhanced firing pin.

I'm delighted that my two AR lowers which have "Burst" markings on them, now actually burst fire.

https://i.imgur.com/WaQH5NM.jpeg" target="_blank">https://i.imgur.com/WaQH5NM.jpeg
View Quote



Thank you for letting us know how you corrected it.

I just ordered an ARCFire V2 45/90 and the CARL with both the 3 rd and optional 2 rd limiter.

4/10/2026 6:40:47 PM EDT
[#32]
Quote History
Originally Posted By tripntx:



Thank you for letting us know how you corrected it.

I just ordered an ARCFire V2 45/90 and the CARL with both the 3 rd and optional 2 rd limiter.

View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By tripntx:
Originally Posted By ELittlefield:
Absolute success in my A4 clone! I bought an enhanced firing pin from Black Rifle Arms, designed for 7.62x39 and 5.45x39. I first did single fire, to check that it wasn't piercing my primers, and then tested it out in 3 round burst. Perfect function, ZERO light strikes. I am one happy camper. So to sum up, I have 2x CARLs. My first one is going in an A2 carbine build, for which I just ordered a 10.5 barrel. It was occasionally bursting two rounds, and then had a dead trigger. It required the two disconnectors to be deburred around the edges, to eliminate the sharp bits where the stamping machine left slight burrs. It now functions perfectly.

The second one I bought is in this A4 clone. It was simply not igniting primers on the first round. The hammer spring seems to be right on the edge of powerful enough, which makes some sense, being a single leg spring. The fix was to install an enhanced firing pin.

I'm delighted that my two AR lowers which have "Burst" markings on them, now actually burst fire.

https://i.imgur.com/WaQH5NM.jpeg" target="_blank">https://i.imgur.com/WaQH5NM.jpeg



Thank you for letting us know how you corrected it.

I just ordered an ARCFire V2 45/90 and the CARL with both the 3 rd and optional 2 rd limiter.


Awesome.

I should also mention, both of my CARLs are used with Cornfire MARCs, and generic, mil spec trigger shoes.
4/10/2026 6:52:20 PM EDT
[#33]
Quote History
Originally Posted By ELittlefield:

Awesome.

I should also mention, both of my CARLs are used with Cornfire MARCs, and generic, mil spec trigger shoes.
View Quote



No worries, I was aware.
4/18/2026 4:14:44 PM EDT
[Last Edit: Apple3_14159][Edited] [#34]
I installed it with an Arc Fire v1 and the burst function seems to work in dry fire, but the trigger occasionally won't reset in semi and never resets in burst. Will try to troubleshoot later.

I might end up trying with a v2 though, since the v1's selector levers are about 5 degrees off straight and it's annoying. Edit: this is a problem with the v2 as well (both have a lot of play between the selector lever and body) but I was able to get it aligned.
4/20/2026 2:35:31 PM EDT
[Last Edit: Apple3_14159][Edited] [#35]
It's resetting much more reliably after following these instructions. Basically a bunch of hand cycling to smooth things out.

With the cam in the 3rd groove (final round of the burst) and the hammer cocked, you "flick" the hammer down repeatedly.  This smacks the disconnector surfaces past each other and helps clearance the system, breaking any burrs or minor clearance issues.  If you can't get the diaconnector to let go of the hammer with the flick trick, then you need to very gently file the tip of it back so it doesn't engage the hammer as much.
View Quote


Also, somehow using a real M16 burst trigger or a custom trigger design so that both disconnector springs are captured instead of the second one being freestanding would be much nicer. At least with my trigger, the CARL's spring has to sit on a slanted surface for it to not be bent at the top.
6/11/2026 7:44:22 PM EDT
[#36]
I finally got mine running today. The gun it was in before has a tiny gas hole and will barely cycle an H buffer with a can. Moved it to a 14.5" with a Faxon barrel, h2 buffer, ran perfect for 3 mags.
Stolen Firearm: Colt AR15, Serial # SP342380, 16" carbine. Stolen in California by Kevin Ayres, and taken to Missouri.
6/19/2026 10:19:48 PM EDT
[#37]
Any more feedback or testing on these ?
6/19/2026 10:22:47 PM EDT
[#38]
Quote History
Originally Posted By Grinder:
Any more feedback or testing on these ?
View Quote

A lukewarm "yeah, neat" from me. You should be willing to do some troubleshooting if you want one, but the result is awesome for cloning purposes, or for introducing your friends to FRTs for the first time.
It was not preached to the crowd,
It was not taught by the State.
No man spoke it aloud,
When the English began to hate.
6/19/2026 10:30:03 PM EDT
[#39]
Quote History
Originally Posted By Grinder:
Any more feedback or testing on these ?
View Quote


They seem finicky.  Some people drop them in and they run. Others have to really screw with them to make 'em run.
Stolen Firearm: Colt AR15, Serial # SP342380, 16" carbine. Stolen in California by Kevin Ayres, and taken to Missouri.
7/20/2026 7:27:47 AM EDT
[#40]
I now have three CARLs, and now they’re all paired with Gen 1 ARC-Fires. I bought several when they were blowing them out around the V2 release date. The first two worked after the tweaking described above, and the third one dropped right in. Seems their QC is trending in the right direction?

The third one went in my new M4 Carbine build.
It was not preached to the crowd,
It was not taught by the State.
No man spoke it aloud,
When the English began to hate.
7/20/2026 11:03:11 AM EDT
[#41]
I feel like I should own another, but all my AR's already have an FRT
Stolen Firearm: Colt AR15, Serial # SP342380, 16" carbine. Stolen in California by Kevin Ayres, and taken to Missouri.
9/1/2026 6:59:26 PM EDT
[#42]
Has anyone had good luck with the CARL in a blowback 9mm?

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