The JS 9mm () is a commercial export version of the QCW-05 (with the exception of different chambering.) It is a suppressed submachine gun developed by the Jianshe Industries (Group) Corporation of Chongqing. The JS 9mm is capable of using any 919mm round, including the popular 919mm Parabellum round but has specifically been chambered for the indigenous, armour-piercing 919mm DAP92-9 round.
Does this next sentence follow, given the preceding text?
The popular rounds are 9x9mm

Options are:
a). Yes.
b). It's impossible to say.
c). No.
c).