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2/4/2026 5:05:57 PM EDT
[#1]
I installed it in yet another gun, this time with an ARC-Fire instead of Cornfire. This time I got several 3 round bursts, then a 2 round burst with a dead trigger/live round, and then it was 1 shot with a dead trigger/live round.

I've done the "flick" polishing method some, I guess I'll do it a bunch more.

The first few bursts, I was incredibly happy. I think this will make for a tremendously fun gun once the kinks are worked out.
2/5/2026 5:51:25 PM EDT
[#2]
Tried it in a fourth gun, again with an ARC-Fire. It worked in semi, then I flipped over to burst and got a perfect 3 round burst, then a dead trigger on a live round, dimpled primer. It doesn't seem to be failing the function test in their install video, and I've "flicked" the hammer a bunch of times. I suppose I can start filing or tweaking the secondary disconnector. I'd sure like to have a backup disconnector in hand before I start tweaking mine.
2/5/2026 7:58:23 PM EDT
[#3]
Quote History
Originally Posted By ELittlefield:
Tried it in a fourth gun, again with an ARC-Fire. It worked in semi, then I flipped over to burst and got a perfect 3 round burst, then a dead trigger on a live round, dimpled primer. It doesn't seem to be failing the function test in their install video, and I've "flicked" the hammer a bunch of times. I suppose I can start filing or tweaking the secondary disconnector. I'd sure like to have a backup disconnector in hand before I start tweaking mine.
View Quote


Aye caramba!  Thank you for your tenacity and follow ups on this.
2/5/2026 8:04:44 PM EDT
[#4]
Sounds like they truly made it clone correct.
2/5/2026 8:14:38 PM EDT
[#5]
Quote History
Originally Posted By bkpkr:
Sounds like they truly made it clone correct.
View Quote

Oh snap!
2/5/2026 8:17:34 PM EDT
[#6]
This would really add a nice touch of authenticity to A2, A4, and M4 clones.
2/6/2026 10:33:26 AM EDT
[#7]
Quote History
Originally Posted By bkpkr:
Sounds like they truly made it clone correct.
View Quote

2/9/2026 2:07:30 PM EDT
[#8]
Just got one in myself! looking to try it out with the Atrius FRS and plan on doing some content with it shortly.

2/9/2026 2:42:28 PM EDT
[#9]
How did they get that past ATF?
2/9/2026 3:01:49 PM EDT
[#10]
Originally Posted By Vikingsouthpaw:
How did they get that past ATF?
View Quote


Get what past the ATF? It works with an FRT and you are pulling the trigger each time. It just limits the number of times it allows the trigger to reset.
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.

2/10/2026 5:36:15 PM EDT
[#11]
The boys over at Stuff and Things are sending me a new secondary disconnector. They seem like genuine gun guys, who want to make an awesome product!
2/10/2026 8:35:37 PM EDT
[#12]
They are a great group of lads with a great sense of humor.
2/10/2026 8:42:25 PM EDT
[Last Edit: Sputnik556][Edited] [#13]
I got excited until I saw the price.😬

By the time I bought the FRT and the SSA and then this, $$$
If you aren't representing Jesus in a way that makes people want to hang out with you, you're doing it wrong.
2/11/2026 6:17:12 AM EDT
[Last Edit: STJ][Edited] [#14]
Quote History
Originally Posted By Sputnik556:
I got excited until I saw the price.  

By the time I bought the FRT and the SSA and then this, $$$
View Quote
Not compared to a registered receiver


On a side note, shot a Atrius with a Carl at the range,  It's very nice, the three round burst feels like the right amount of brt

2/11/2026 10:07:05 AM EDT
[#15]
Quote History
Originally Posted By STJ:
Not compared to a registered receiver


On a side note, shot a Atrius with a Carl at the range,  It's very nice, the three round burst feels like the right amount of brt

View Quote View All Quotes
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Quote History
Originally Posted By STJ:
Originally Posted By Sputnik556:
I got excited until I saw the price.  

By the time I bought the FRT and the SSA and then this, $$$
Not compared to a registered receiver


On a side note, shot a Atrius with a Carl at the range,  It's very nice, the three round burst feels like the right amount of brt


How does it feel compared to the real thing?
If you aren't representing Jesus in a way that makes people want to hang out with you, you're doing it wrong.
2/14/2026 1:44:10 AM EDT
[#16]
Where does 1 buy mil spec safety paddles for the arc fire SS?  I wanna do a a2/a4 clone build.
2/14/2026 2:03:28 AM EDT
[#17]
Quote History
Originally Posted By country_boy87:
Where does 1 buy mil spec safety paddles for the arc fire SS?  I wanna do a a2/a4 clone build.
View Quote


https://activesafetydesigns.com/arc-fire-parts/arc-fire-mil-spec-selectors/
Stolen Firearm: Colt AR15, Serial # SP342380, 16" carbine. Stolen in California by Kevin Ayres, and taken to Missouri.
2/17/2026 8:54:52 PM EDT
[#18]
My new disconnectors came in from Stuff and Things. I probably won't be able to test them for several days... we're projected for a foot of snow tonight.
2/17/2026 9:55:58 PM EDT
[#19]
Quote History
Originally Posted By ELittlefield:
My new disconnectors came in from Stuff and Things. I probably won't be able to test them for several days... we're projected for a foot of snow tonight.
View Quote


I know the feeling. Today was take your Arc-fire to work day. Figured I could hit my not-so-secret dirt road and make sure it runs before installing Carl. Snow had other plans
Stolen Firearm: Colt AR15, Serial # SP342380, 16" carbine. Stolen in California by Kevin Ayres, and taken to Missouri.
2/17/2026 10:19:12 PM EDT
[#20]
Quote History
Originally Posted By HK94dude:


I know the feeling. Today was take your Arc-fire to work day. Figured I could hit my not-so-secret dirt road and make sure it runs before installing Carl. Snow had other plans
View Quote View All Quotes
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Quote History
Originally Posted By HK94dude:
Originally Posted By ELittlefield:
My new disconnectors came in from Stuff and Things. I probably won't be able to test them for several days... we're projected for a foot of snow tonight.


I know the feeling. Today was take your Arc-fire to work day. Figured I could hit my not-so-secret dirt road and make sure it runs before installing Carl. Snow had other plans

I did get them installed, and run through function tests. This time it behaved just like the video showed, with a slight catching that I rounded off by flicking the hammer about a hundred times. If this setup doesn't work, I'm going to stone all of the edges of both disconnectors (not the critical dimensions) in order to eliminate any catching happening there. There's certainly some burrs around the edge. I'm not in manufacturing, I'm not sure what exactly you would call it. It's not quite flashing, like from the edges of a forge die, but that general idea.
2/19/2026 5:35:22 PM EDT
[#21]
It works, it works! I have the 3 round burst running! It's a Hoffman at the moment, but I'm going to install a Cornfire and hopefully test that tomorrow.

2x 20 round magazines.

" />
2/19/2026 5:53:31 PM EDT
[#22]
When are more carls coming?  I wanna try.
2/19/2026 6:09:31 PM EDT
[#23]
Quote History
Originally Posted By ELittlefield:
It works, it works! I have the 3 round burst running! It's a Hoffman at the moment, but I'm going to install a Cornfire and hopefully test that tomorrow.

2x 20 round magazines.

[url]https://i.imgur.com/t0XS2I4.jpeg">https://i.imgur.com/t0XS2I4.jpeg">[url]https://i.imgur.com/t0XS2I4.jpeg
View Quote
Nice
An armed society is a polite society.
2/19/2026 6:56:34 PM EDT
[#24]
Very cool!
N&MEM, SSDR, NRA Life Member

Epstein Scalia did not kill himself.

Gun control is literally Hitler.

Trump's actions? Watergate does not bother me, does your conscience bother you?
2/19/2026 6:59:16 PM EDT
[#25]
Quote History
Originally Posted By ELittlefield:
It works, it works! I have the 3 round burst running! It's a Hoffman at the moment, but I'm going to install a Cornfire and hopefully test that tomorrow.

2x 20 round magazines.

[url]https://i.imgur.com/t0XS2I4.jpeg">https://i.imgur.com/t0XS2I4.jpeg">[url]https://i.imgur.com/t0XS2I4.jpeg
View Quote
Great! Still waiting an in-stock notice...
2/19/2026 7:38:33 PM EDT
[Last Edit: Texasag10][Edited] [#26]
Just posted one for sale in EE. Decided to put money towards NT4 instead

Sold now
2/19/2026 9:26:49 PM EDT
[Last Edit: nighttrainnc][Edited] [#27]
CARL aside,

What is the difference between the arcfire, marc, hoffman, atrius, cornfire, etc...

Which are FRTs and which are Super safeties, and which design is best?

Also, are most the same design and just different companies making them?
............

I'm not up on the latest updates in this area so while I've heard of the super safety craze,
I was under the impression that FRT was a different design and I remember RareBreed coming out with one years back.
.......
Also, is it the FRT or SS where the safety axis has the long arm in the center?
2/19/2026 10:28:20 PM EDT
[#28]
Quote History
Originally Posted By nighttrainnc:
CARL aside,

What is the difference between the arcfire, marc, hoffman, atrius, cornfire, etc...

Which are FRTs and which are Super safeties, and which design is best?

Also, are most the same design and just different companies making them?
............

I'm not up on the latest updates in this area so while I've heard of the super safety craze,
I was under the impression that FRT was a different design and I remember RareBreed coming out with one years back.
.......
Also, is it the FRT or SS where the safety axis has the long arm in the center?
View Quote

Generally, the "super safety" refers to a forced reset selector which uses a lever, actuated by the bolt carrier group, in order to turn a cam which forces the trigger to reset. The Hoffman is the classic, original design of this, which uses a push button safety with options for safe mode, forced reset mode, and standard semi auto mode. The ARC-Fire, Cornfire MARC, and Atrius all use a switch, like a standard AR safety, but the basic technology is similar to the Hoffman. It's a lever, actuated by the BCG, to turn a cam.

The Rare Breed FRT-15L3 and Partisan Disruptor are very similar to each other, they're cassette style drop in FRT triggers.

The Arizona Regulator, BS Squirts, and a couple other modules are drop in devices that sort of fit in the back of your AR receivers.

Most of the FRTs on the market require an H2 or H3 buffer with sliding tungsten weights, in order to eliminate carrier bounce, which disables your trigger after a short burst of rounds.

In my opinion, the AS Designs ARC-Fire, with a Geissele trigger, is the best FRT on the market. It has a Geissele quality trigger pull in semi auto (and in FRT mode) which I prize greatly, and its lever is a lot thicker and theoretically more robust than the thinner Atrius and Cornfire MARC levers. It's 250 bucks, plus the cost of a Geissele trigger, which requires a modest modification at the tail of the trigger shoe, and you need a stamped steel lever blocker. About 500 bucks all in, if you buy the parts.

If you want to get into the FRT game, I strongly recommend you start with a Hoffman Super Safety. You can get the whole setup for under 150 bucks, and learn how the tech works, before exploring more advanced options.
2/21/2026 6:08:40 PM EDT
[Last Edit: ELittlefield][Edited] [#29]
I tested out the Cornfire CARL today. I had a dead trigger once, which I couldn't diagnose, out of 60 rounds.

I just want it to be warm out again. Diagnosing malfunctioning guns at 8 degrees minus wind chill sucks ass.
2/23/2026 1:07:05 PM EDT
[#30]
I got my PSA PX9 (AR9) running with a Super Safety. It took dremelling the high shelf in the receiver down. A 3rd burst limiter might be a good thing for this gun with 33rd mags. 11 x 3rd bursts might be useful.




2/23/2026 1:58:30 PM EDT
[#31]
Quote History
Originally Posted By drobs:
I got my PSA PX9 (AR9) running with a Super Safety. It took dremelling the high shelf in the receiver down. A 3rd burst limiter might be a good thing for this gun with 33rd mags. 11 x 3rd bursts might be useful.

https://www.ar15.com/media/mediaFiles/41568/PSA_AR9-3718299.jpg


View Quote

Cool.
2/24/2026 9:27:55 PM EDT
[Last Edit: DoctorMRG][Edited] [#32]
Quote History
Originally Posted By country_boy87:
When are more carls coming?  I wanna try.
View Quote

They will drop more this week.

I got my CARL working perfectly in my H&R M16A2 clone with an ARC-Fire trigger.  Initially, I had reliability issues discussed above. After emailing them and watching their troubleshooting video, I polished the leading surface of the secondary disconnector, reassembled, and now it works just like it should.  Last weekend, I shot 200+ rounds without a single failure.  This is a great addition to A2/A4 burst marked clones.
2/24/2026 10:18:07 PM EDT
[#33]
Quote History
Originally Posted By DoctorMRG:

They will drop more this week.

I got my CARL working perfectly in my H&R M16A2 clone with an ARC-Fire trigger.  Initially, I had reliability issues discussed above. After emailing them and watching their troubleshooting video, I polished the leading surface of the secondary disconnector, reassembled, and now it works just like it should.  Last weekend, I shot 200+ rounds without a single failure.  This is a great addition to A2/A4 burst marked clones.
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By DoctorMRG:
Originally Posted By country_boy87:
When are more carls coming?  I wanna try.

They will drop more this week.

I got my CARL working perfectly in my H&R M16A2 clone with an ARC-Fire trigger.  Initially, I had reliability issues discussed above. After emailing them and watching their troubleshooting video, I polished the leading surface of the secondary disconnector, reassembled, and now it works just like it should.  Last weekend, I shot 200+ rounds without a single failure.  This is a great addition to A2/A4 burst marked clones.

What did you do to polish it?

I think I need the smallest amount of additional material taken off and smoothed.
2/24/2026 10:48:39 PM EDT
[#34]
Quote History
Originally Posted By ELittlefield:

What did you do to polish it?

I think I need the smallest amount of additional material taken off and smoothed.
View Quote


Watch the second video CARL Troubleshooting.  

It shows exactly where to focus upon. I used a small jewelers flat file....  maybe 5 strokes and then reassembled.

After that, it worked perfectly for me.
2/24/2026 10:48:53 PM EDT
[Last Edit: DoctorMRG][Edited] [#35]
IMHO The only downside to the CARL is the cost.

2/24/2026 10:54:22 PM EDT
[#36]
Quote History
Originally Posted By DoctorMRG:
IMHO The only downside to the CARL is the cost.

View Quote

FRTs are not a poor man's hobby, that's for sure.
2/26/2026 5:59:37 PM EDT
[#37]
I see CARLs are back in stock. How are they working for folks here? Did you early adopters figure out the kinks in this system?
2/26/2026 8:59:02 PM EDT
[Last Edit: HKH][Edited] [#38]
Damn website was so slow I ordered two of them and a two round burst.  I cleared them from my cart but somehow they remained…

Anyway I guess I’ll sell one Carl and maybe keep the 2 rd mechanism.  I don’t really see a need for 2 carls, unless I have one 2 rd and one 3 rd…. Hmm
2/26/2026 9:19:58 PM EDT
[#39]
Quote History
Originally Posted By StealthyBlagga:
I see CARLs are back in stock. How are they working for folks here? Did you early adopters figure out the kinks in this system?
View Quote

Pretty much yes, once I got the new disconnectors. I had one failure in about 80 rounds, but it was so bloody cold I didn't want to sit there diagnosing it. So eager to get the gun back in the truck and get out of the wind that I missed my silencer pad on the floorboard.

" />
2/26/2026 9:23:07 PM EDT
[#40]
It took me over 20 mins to try and order. I honestly didn’t think I’d be able to make an order.  At first my cart showed a total of 5 in quantity, I deleted the cart, started over.  I ordered just 1 and a 2 rd limiter to play with.

2/26/2026 9:26:56 PM EDT
[#41]
Quote History
Originally Posted By country_boy87:
It took me over 20 mins to try and order. I honestly didn’t think I’d be able to make an order.  At first my cart showed a total of 5 in quantity, I deleted the cart, started over.  I ordered just 1 and a 2 rd limiter to play with.

View Quote

I think I'll pass on the 2 round limiter for now... but it's great to see them iterating on the design. I ordered one more today, I think I'm going to try to get it going with a 22.
2/26/2026 10:11:32 PM EDT
[#42]
Quote History
Originally Posted By ELittlefield:

I think I'll pass on the 2 round limiter for now... but it's great to see them iterating on the design. I ordered one more today, I think I'm going to try to get it going with a 22.
View Quote


Seeing 5 in my cart freaked me out it was over $550!

Hey did you use desk pops promo code?
2/26/2026 10:32:42 PM EDT
[#43]
Quote History
Originally Posted By country_boy87:


Seeing 5 in my cart freaked me out it was over $550!

Hey did you use desk pops promo code?
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By country_boy87:
Originally Posted By ELittlefield:

I think I'll pass on the 2 round limiter for now... but it's great to see them iterating on the design. I ordered one more today, I think I'm going to try to get it going with a 22.


Seeing 5 in my cart freaked me out it was over $550!

Hey did you use desk pops promo code?

I used Please for 7.50 off.
2/26/2026 11:08:01 PM EDT
[#44]
I ordered the 2 position cam. Not sure what I'll do with it though.
Stolen Firearm: Colt AR15, Serial # SP342380, 16" carbine. Stolen in California by Kevin Ayres, and taken to Missouri.
2/28/2026 9:25:38 AM EDT
[Last Edit: 1NAVYCHIEF-RET][Edited] [#45]
It would be really great if they could produce a 4-position set-up

SAFE - SUPER SEMI - SEMI - 2/3 Shot CARL

Then a 605B Clone would be possible.
2/28/2026 8:25:53 PM EDT
[#46]
Finally got my Arc-fire installed, tested and running. Hoping to test out Carl on Thursday

Stolen Firearm: Colt AR15, Serial # SP342380, 16" carbine. Stolen in California by Kevin Ayres, and taken to Missouri.
3/3/2026 10:17:07 PM EDT
[#47]
I received my second CARL today, and installed it in my M16A4 clone. The first intsall I did with a USGI trigger shoe didn't pass function tests, it felt like there was binding somewhere, and the third round did not reset it, though the cam was rotating. I swapped in a different shoe, and now it passes dry fire tests, and feels freer and looser. I shall live fire test tomorrow. Y'all may recall that I had my first CARL in this gun, and kept getting light primer strikes before they sent me new disconnectors.

" />
3/4/2026 2:47:19 AM EDT
[#48]
Does the Carl come with instructions?  I have no idea what to do when it arrives tomorrow lol.  Need to figure it out.
3/4/2026 6:24:41 AM EDT
[#49]
Quote History
Originally Posted By HKH:
Does the Carl come with instructions?  I have no idea what to do when it arrives tomorrow lol.  Need to figure it out.
View Quote

Mine didn’t, there’s a video on their site.

It wasn’t too difficult, but definitely more involved than standard FCG installation.
If you aren't representing Jesus in a way that makes people want to hang out with you, you're doing it wrong.
3/4/2026 8:02:50 AM EDT
[#50]
Quote History
Originally Posted By HKH:
Does the Carl come with instructions?  I have no idea what to do when it arrives tomorrow lol.  Need to figure it out.
View Quote

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

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