Ok. I'll take your word for it. Maybe it's been the media that's been spreading this myth? Or maybe most people just assumed it would be illegal since most people only know of "suppressors" (aka "silencers") in action films.
This is probably why suppressor companies have to remind people on their websites that suppressors ARE LEGAL in the US...and I think in the UK.
Canada, being supremely strict as they are...I doubt it. But I'm hoping I'm wrong. So much more freedom here in the US.