u/CroczNglockz

I recently bought a SilencerCo Spectre 9 for a .32 Walther PPK S/D that I’m waiting to pick up. The store employee said that I need a piston to run the suppressor… but from my research due to a PPK having a fixed barrel, I do NOT need one and using one can actually be detrimental. Would someone please be able to fill me in on what the best practice is? It would be much appreciated