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AR15.COM
5/25/2026 2:52:30 PM EDT
[Last Edit: Dull-shooterM4][Edited]
As the title says, im looking to build a NY legal 9mm AR.

I haven’t built anything in several years and I pinned my old preban 556 guns with 10 rounders.

I now have a my pistol license and my range recently approved pistol caliber carbines in addition to handguns.

Now I finally have a reason to build a 9mm carbine. For range use, id like to retain detachable magazines so feature-less is my preference.

Budget build. Who ships uppers to NY still?  Who makes a non threaded 9mm 16 in barrel?  Magwell adaptor or dedicated lower ?  Thordsen stock or what other options?

ETA: im not on here as much as i used to be so forgive me if i only check this post every other day

5/25/2026 9:03:42 PM EDT
[#1]
Why not just get the ruger 9mm carbine that takes glock magazines?
5/25/2026 9:35:25 PM EDT
[#2]
Because what fun would that be?

This is AR15.com isn’t it ??
5/25/2026 11:59:59 PM EDT
[Last Edit: JayJay4735][Edited] [#3]
I don't know that anyone sells a non-threaded 9mm barrel only these days. Dark storm used to, but doesn't seem to be on their website anymore. CMMG sells a non-threaded upper but I don't think that will fall under the category of budget build (at least not to me). Last I remember hearing, Thordsen was shutting down, so you'll have to go hunting around to try and find a stock.
5/26/2026 12:11:40 PM EDT
[#4]
FYI just finished a neutered AR build for my cousin incorporating an original Thordsen stock and I honestly do not know how anyone with normal or above normal arm length shoots it.
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5/26/2026 12:38:07 PM EDT
[#5]
Thanks both of you.

Is pinning a thread protector acceptable?  I
5/26/2026 3:20:19 PM EDT
[#6]
Quote History
Originally Posted By Dull-shooterM4:
Thanks both of you.

Is pinning a thread protector acceptable?  I
View Quote
Pin/weld, yes.  Mine are perm loctited.  YMMV.
Award: 24/365 Most likely to be an appendix.

"Dealing with Congress is like trying to have an adult conversation about the credit card with your alcoholic bi-polar Ukranian import wife."
5/28/2026 9:05:50 PM EDT
[#7]
It’s not even worth it to try to make a “compliant” AR, especially not a 9mm one

Ruger PCC is way more fun anyways

Ruger
5/29/2026 5:27:14 PM EDT
[#8]
New LGS one town over had 1 thordsen hanging on the wall and several lowers.

Bought a pair of lowers and the stock. Ordered a magwell adapter and upper from right to bear. And a thread protector from Amazon to be pinned and welded.
5/30/2026 9:29:33 AM EDT
[#9]
Quote History
Originally Posted By Dull-shooterM4:
Because what fun would that be?

This is AR15.com isn't it ??
View Quote
Yes, so the answer is both, so build the ar15 version just as a project.  Use the Ruger (w/glock mags) at the range.
5/30/2026 4:09:45 PM EDT
[#10]
Quote History
Originally Posted By Lion:
Yes, so the answer is both, so build the ar15 version just as a project.  Use the Ruger (w/glock mags) at the range.
View Quote


Get both. Yes that IS the Arfcom way.

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