I have not been made aware of their concerns. But one thing is sure, by loosening the safeguards around restricted firearms—and the current government has admitted that these are dangerous weapons—we are increasing the risk of their falling into the wrong hands, and the risk that they could be used impulsively.
In the United States, road rage often ends with shots being fired rather than punches being exchanged. By allowing the transportation of restricted weapons between thousands of places—shooting clubs, firing ranges and police stations, amongst other places—there is no doubt that, regardless of where you are with your handgun, you might be between your home and one of these other places.
Lastly, under Bill C-42, handgun owners, who have them for very specific purposes, for instance to go to a shooting club, to a firing range or to a gunsmith to get them fixed, will be able to transport them anywhere.