Sorry to say this but people will always find a way to get guns into your country such as smuggling. So if guns are banned that simply means it's illegal to own and sell guns. As long as there are guns in the world, they will never really be banned. It's just like gum and sharpies in High school, they are banned, but still there.
LOL, here you go directly in prison for these 3 silenced guns, regardless the fact that you have or not gun permissions ..... here the law just ban not just any type of silencers, but also all the guns that have a threaded barrel for use it (yes, if you have a regular gun and you get it with the end barrel threaded for fit a silencer, you go in prison )
if it makes you feel any better, silencers aren't that quiet.
A GREAT 9mm silencer still has a ~110dB shot report. Kind of like a nail gun or paintball gun.
Not "hollywood quiet" but certainly not very loud.
Here's some stories I've heard with silencers. On a 10/22 with a silencer, the loudest part is the bolt slapping around, but .22s are quiet to begin with. According to the guy at the gun store, his suppressed ruger mk III sounded like a BB gun, and his .45 with a HUGE silencer (he showed me, it was like a foot long and 3 inches wide LOL) sounded like his mk III unsuppressed.