Fair warning: Glocks and Glock clones may become less reliable when running a suppressor. Or become finicky about ammo.
The conventional wisdom is a factory Glock with the right suppressor can run reliably. A Glock that's been fucked with, which would include all PMFs, may not bring you the joy of silence you seek. Barrels, slides, springs, and fitment all matter when you attach a can. So before you drop 800 bucks hoping for pffft pffft, consider the risks of it not working the way you expected.
A Glock will absolutely require a Nielsen device. A simple threaded adapter is not likely to work well.