AK is a Rifle. In both standard Russian calibers (47/74) it also makes one heck of a SBR.
As a carbine I don't see the point, only an SBR would make sense in 9mm. As an SBR its effectively a subgun. Its not like an AR where you swap the mag, mag holder and upper and have two guns in one.
With Proven subgen platforms offered in 9mm like the MP5 and UZI, and with reputable clone manufacturers offering the MP5 in the $1600-2000, or Uzi in the $800-1200 range, why do we need a 9mm AK?
I'm not saying there isn't room for a 9mm AK, I guess I'm just saying there are better options for $1600 in 9mm.
I'm not dissing the AK platform, just picked up a PAPM92 and love it, I just think it has great calibers to begin with, so why try to make it something its not.