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IAR 11.5 Uppers available (Page 5 of 11)

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10/23/2025 9:45:30 PM EDT
[#1]
Any ETA on the 16" version?
10/23/2025 9:46:49 PM EDT
[#2]
Should be rolling out in the next 30 days or so. I heard they got a little delayed.
11/21/2025 4:05:40 PM EDT
[Last Edit: Stonia][Edited] [#3]
AZ Regulator 3-pos runs great.
Attached File
11/22/2025 10:33:48 PM EDT
[#4]
16" Uppers are listed on the AU site, currently OOS, but it shouldn't be too long now.

Colt must be doing a run of monolithic uppers, because they have 6940 ,6943, 6944, and 6945 uppers listed as OOS on the AU site as well.

Link
11/23/2025 7:35:25 PM EDT
[#5]
Quote History
Originally Posted By AK-12:
16" Uppers are listed on the AU site, currently OOS, but it shouldn't be too long now.

Colt must be doing a run of monolithic uppers, because they have 6940 ,6943, 6944, and 6945 uppers listed as OOS on the AU site as well.

Link
View Quote

1800

Of course they’d drop here at the holidays.  C’est la vie
Support the Firearms Policy Coalition and help save the Second Amendment: https://www.firearmspolicy.org

The opinions expressed here are my own and do not necessarily reflect the views of my current or former employers.
11/24/2025 6:14:02 PM EDT
[#6]
Quote History
Originally Posted By Findsman:

1800

Of course they’d drop here at the holidays.  C’est la vie
View Quote


That's what I was thinking. I'd like to have one, but $1799 is a little steap. Maybe they will drop once they've been out for awhile.
11/24/2025 6:58:35 PM EDT
[#7]
IIRC the 11.5 started at $1800 and then dropped to the current price of $1300 after awhile.
11/24/2025 7:11:36 PM EDT
[#8]
why the big handguard?
11/24/2025 7:22:16 PM EDT
[Last Edit: Stonia][Edited] [#9]
Quote History
Originally Posted By pogmothoin:
why the big handguard?
View Quote


The IAR has a large heat sink.
11/24/2025 9:05:10 PM EDT
[Last Edit: Milspec99][Edited] [#10]
This design is primarily to aid with heat dissipation when firing full auto, correct?
11/24/2025 10:54:33 PM EDT
[Last Edit: AK-12][Edited] [#11]
Quote History
Originally Posted By Milspec99:
This design is primarily to add with heat dissipation when firing full auto, correct?
View Quote


Correct.

But for most of us it is a means to clone a rare rifle that Colt submitted for the M27 contract which the HK416 won.
11/25/2025 3:00:21 PM EDT
[#12]
Quote History
Originally Posted By Milspec99:
This design is primarily to aid with heat dissipation when firing full auto, correct?
View Quote


Yes but it also helps synchronize the barrel as well. Reed helped with the design
11/25/2025 8:03:28 PM EDT
[#13]
Quote History
Originally Posted By aeyoung:


Yes but it also helps synchronize the barrel as well. Reed helped with the design
View Quote


What does that mean exactly?
11/25/2025 10:54:03 PM EDT
[#14]
Quote History
Originally Posted By the_AR-15_Junkie:


What does that mean exactly?
View Quote


Sorry meant harmonizer lol

The barrel when shooting flexes ever so slightly. Reed, along with colt, designed a dual use heat sync that helps reduce the flex in full auto rate. That’s what makes the IAR such an accurate gun on sustained rate of fire
11/26/2025 6:19:02 AM EDT
[#15]
Quote History
Originally Posted By aeyoung:


Sorry meant harmonizer lol

The barrel when shooting flexes ever so slightly. Reed, along with colt, designed a dual use heat sync that helps reduce the flex in full auto rate. That’s what makes the IAR such an accurate gun on sustained rate of fire
View Quote



Thank you for the explanation!
11/26/2025 1:19:02 PM EDT
[#16]
Has anyone run one of these uppers with a Surefire Optimized Bolt Carrier Group?

It seems like that BCG would fit the use case of these uppers perfectly, especially paired with something like an Arizona Regulator 3 position like mentioned above.
11/26/2025 11:33:21 PM EDT
[Last Edit: Apple3_14159][Edited] [#17]
97 currently in stock for $1400.
https://armsunlimited.com/colt-iar-556-upper-receiver-assembly-16-barrel/
11/26/2025 11:36:26 PM EDT
[#18]
AU has sale 1399.00 so just ordered the 16 inch.
11/27/2025 10:01:23 PM EDT
[#19]
Please let us know how it goes - thanks for sharing!
I began to understand that the body is actually a cage for the soul, rather than a liberator....a vehicle of expression for our souls to interact with the physical dimension, little more.
11/28/2025 6:24:54 PM EDT
[#20]
I just ordered one as well.  Allegedly, only 58 are left.
11/28/2025 10:10:27 PM EDT
[#21]
Where are you guys finding the inventory counts? Man, the 11.5" is nice. But do I really need another 16" upper? 🤔 Decisions, Decisions..
11/28/2025 10:15:21 PM EDT
[#22]
Quote History
Originally Posted By Twizm:
Where are you guys finding the inventory counts? Man, the 11.5" is nice. But do I really need another 16" upper? 🤔 Decisions, Decisions..
View Quote



I assume from trying to add bulk to the cart. It told me insufficient inventory for 100, but let me add 58 to the cart.
11/28/2025 10:18:19 PM EDT
[#23]
I see, good move.. thanks
11/28/2025 10:18:39 PM EDT
[#24]
Quote History
Originally Posted By Twizm:
Where are you guys finding the inventory counts? Man, the 11.5" is nice. But do I really need another 16" upper? 🤔 Decisions, Decisions..
View Quote


I went back and forth on this. 11.5 suppressed would be pretty nice. Settled on 16" for higher velocity and a longer barrel life. Seems right for a super safe lower.

Will prob get the 11.5" later too
11/28/2025 10:31:44 PM EDT
[#25]
Quote History
Originally Posted By Gotterdammerung:


I went back and forth on this. 11.5 suppressed would be pretty nice. Settled on 16" for higher velocity and a longer barrel life. Seems right for a super safe lower.

Will prob get the 11.5" later too
View Quote


You can use the bayo lug on the 16" too.
11/29/2025 2:49:52 AM EDT
[#26]
I was prepared to drop the original $1,800 list price for one of these, but was happy to see they matched the price of the 11.5". I used the savings to buy a Surefire OBC for it.

I guess well see how well it runs.. once I can get my hands on a Arizona Regulator 3-Position.

I'm wondering how it'd run with an A5 receiver extension and Geissele rifle length Super 42 spring and carbine buffer with a spacer in the tube...
11/29/2025 12:32:43 PM EDT
[#27]
Quote History
Originally Posted By Rogue556:
I was prepared to drop the original $1,800 list price for one of these, but was happy to see they matched the price of the 11.5". I used the savings to buy a Surefire OBC for it.

I guess well see how well it runs.. once I can get my hands on a Arizona Regulator 3-Position.

I'm wondering how it'd run with an A5 receiver extension and Geissele rifle length Super 42 spring and carbine buffer with a spacer in the tube...
View Quote


What is the benefit of the longer A5 buffer tube if you put a spacer in it?

IAR trials showed a H3 weight buffer was helpful in reducing bolt bounce. This recommendation is all over the FRT threads too.  
12/1/2025 6:31:55 PM EDT
[#28]
I just sold some stuff to fund the IAR and am having a hard time choosing which setup I want to go with on the 11.5/16 setups + lower. - I wish it could be both uppers, but I have other projects to fund. (Have $1700-1900) to play with.
12/1/2025 10:52:30 PM EDT
[#29]
Was notified  my Colt IAR 16" was shipped today.
12/1/2025 11:12:27 PM EDT
[#30]
Awesome .
12/1/2025 11:20:07 PM EDT
[Last Edit: Jay123][Edited] [#31]
45 more remaining…I would love to find a m4le lower for the IAR
12/2/2025 11:01:44 AM EDT
[#32]
Well shit, I just ordered one. Never got around to getting the shorter version, so here we go!
12/2/2025 3:57:54 PM EDT
[#33]
Quote History
Originally Posted By Jay123:
45 more remaining…I would love to find a m4le lower for the IAR
View Quote


https://armsunlimited.com/colt-m4-commando-556-semi-auto-lower-receiver-assembly/?searchid=2739967&search_query=Colt+lower
12/2/2025 6:04:54 PM EDT
[Last Edit: Twizm][Edited] [#34]
Less than 30 of the 16" now.. These moved much faster than the 11.5" it seems, or they got a very small batch.
12/2/2025 9:47:14 PM EDT
[#35]
I hope you all make out better than I did with my M5.
12/2/2025 11:20:25 PM EDT
[#36]
Quote History
Originally Posted By Twizm:
Less than 30 of the 16" now.. These moved much faster than the 11.5" it seems, or they got a very small batch.
View Quote

I broke down and ordered one today.  They are moving a lot faster than I anticipated as well.  They had some number in the high-90s when I got the first in-stock notification.

Being a regular non-NFA upper probably increases the appeal.  That and 16" ballistically makes a lot more sense than the 11.5" for its intended purpose.  The only thing I can really see is it is far less unwieldy mounting a suppressor, so extended firing with a heavy duty can in a short config?  No regrets buying the shorty aside from getting it at the original price but it definitely is an odd duck.
Support the Firearms Policy Coalition and help save the Second Amendment: https://www.firearmspolicy.org

The opinions expressed here are my own and do not necessarily reflect the views of my current or former employers.
12/3/2025 12:55:01 AM EDT
[Last Edit: Jay123][Edited] [#37]
I believe they only had 100 uppers available on the 26th .
12/3/2025 2:07:52 PM EDT
[#38]
14 more remaining
12/3/2025 2:10:37 PM EDT
[#39]
Wow, I'm shocked they're moving so fast. They must've have a lot more of the 11.5 to start with?
12/3/2025 2:43:38 PM EDT
[#40]
Quote History
Originally Posted By Stonia:
Wow, I'm shocked they're moving so fast. They must've have a lot more of the 11.5 to start with?
View Quote
I believe the 16” is more popular.
12/3/2025 4:41:09 PM EDT
[#41]
Anyone know if these are coming with the kac rear sight shown in the stock photo or the magpul pro like the 11.5”?
12/3/2025 5:49:00 PM EDT
[#42]
Quote History
Originally Posted By Stonia:
Wow, I'm shocked they're moving so fast. They must've have a lot more of the 11.5 to start with?
View Quote

They're likely more popular because they're more practical.  The 11.5's sold out but then came back in stock.  If I had to guess, I'd think that will happen again, but there are obviously no guarantees.
12/3/2025 5:49:26 PM EDT
[#43]
no need to SBR so makes sense
12/3/2025 6:04:14 PM EDT
[Last Edit: Stonia][Edited] [#44]
Quote History
Originally Posted By Bret:

They're likely more popular because they're more practical.  The 11.5's sold out but then came back in stock.  If I had to guess, I'd think that will happen again, but there are obviously no guarantees.
View Quote



That's true. I somehow managed to forget that I got in on the second wave of 11.5 after a long sold-out wait.
12/4/2025 3:44:56 PM EDT
[#45]
9 left.
12/4/2025 4:18:08 PM EDT
[Last Edit: TallPine][Edited] [#46]
Better get one while you can. Surprised there is any left at this point. Often a reseller scoops up the last remaining dozen or so to sell later on at a much higher price once there is no more available. If you ever thought you or a buddy might want one, better snag one soon.
12/4/2025 7:29:42 PM EDT
[Last Edit: Twizm][Edited] [#47]
This batch is gone it seems. Hopefully they will restock sooner than later..
12/4/2025 7:45:31 PM EDT
[Last Edit: TallPine][Edited] [#48]
3 left.

Refresh often. Their site might temp reserve stock while in someone's cart that is just checking quantities.
12/5/2025 10:46:08 AM EDT
[#49]
Just 1 left.....get it while you can
12/5/2025 11:07:28 AM EDT
[#50]
Quote History
Originally Posted By TallPine:
Just 1 left.....get it while you can
View Quote


AU did not receive their full order. They will be getting some more...less than 100 though.

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IAR 11.5 Uppers available (Page 5 of 11)