POF tombstone may be one of your few options. Maybe IRG can bring one in for you

I wonder how hard it would be to come up with a 9mm straight pull ar'ish carbine?
Maybe Maple Ridge Armoury could make a glock mag compatable lower for their straight pull set up and then all that would be needed is an off the shelf 9mm upper.
The 9mm AR based carbines are blowback.
A manually operated - straight pull - carbine would require a locked breech.
Might be possible to set something up with an AR barrel extension and an AR bolt altered for 9mm head diameter in dedicated straight pull upper and lower receivers. A pistol magazine insert could be installed in an existing manually operated lower. That way a brand new lower and upper wouldn't be required.
MRA or Spectre upper and lower, 9mm specific bolt and barrel, magazine well adapter.
I did not release that the 9mm AR rifles were blow-back but that makes sense.
The 5.45x39 bolt has the same bolt face as 9mm. If you don't modify the bolt lugs you should have a single shot.AR bolt altered for 9mm head diameter




























