I can't speak to the notion of a safety risk, but I can speak to the determinations of classification that are made today. When the experts within the Canadian firearms program make the determinations of classifications, those determinations form part of a record which is known as the firearms reference table. There are approximately 180,000 in the firearms reference table today, and every firearm has the criteria by which the determination was made, including reference to the specific portion of the Criminal Code that was used in making that determination. While the firearms reference table isn't a document publicly available, or easily available, the determination of classification made on those firearms is a matter of public record.
On May 8th, 2018. See this statement in context.