I know you thought that was clever...but it's a COMPACT .380 thread; which is why I asked why people are using .380s that aren't any more compact than compact 9mm.
Seems like once the pistol is the same size as a 9mm one would go to the next level of power since capacity isn't a big issue with these mouse guns.
I hear what you're saying, but they don't make the PPK/S in 9mm Parabellum, only in .32 AP and .380 ACP.