When speaking of restricted firearms, most people think of handguns. Some handguns may also be qualified as prohibited. For example, certain short-barrelled firearms, such as a Second World War luger, may be deemed to be a prohibited firearm. There are other types of firearms that are prohibited because they are semi-automatic, or rather derivative of automatic firearms, or automatic firearms, but in most cases the transport of those firearms is pretty limited right now.
On May 8th, 2018. See this statement in context.