The less you know, the less you're responsible for.
Ah, well I'll just have to assume then. I'll take QFI to stand for "quoted for ignorance."
So let me tell you what the armory may ask you next when you ask for a "silencer." "Are you going to be shooting it wet or dry?" You'll probably sit there with a stupid look on your face because "silencers" make absolutely no noise like in the movies, and would have no idea what he's talking about.
The FACTS are, if you ask for an HK USP Tactical (think of it as an upgrade to the Mark 23), and ask for a silencer, they will hand you a
supressor. And the best supressors on the market now are the Osprey and AAC Ti-Rant. Neither are completely silent. Dry or wet. You then need to use sub sonic rounds to make it even quieter.
Again, there is no such thing as a movie style "silencer." They all make noise, but the supressor definitely quiets the shot down quite a bit. Normally around 122db for a 9mm (dry).
Now come back to me when you know WTF you're talking about. I'll let you assume what "WTF" stands for. It's a safe bet.