>>64155499
checked,
the 1990 mil requirement definition of "PDW" was always just a submachine gun with a new cartridge (that had different 'extended' ballistics from pistol rounds).
Gun itself is a submachine gun in size class.
Picrel submachine gun can be made into an actual PDW by switching out the barrel
https://sadefensejournal.com/brugger-thomet-mp9-in-6-5x-25-cbj/