I listened closely to what Inspector Rowe had to say. It's an interesting perspective. I guess there are competing points of view here.
As a criminal defence lawyer, I'm of the view that if something's illegal once, it doesn't have to be illegal two, three or four times. It's a crime to possess a prohibited device. A magazine that holds more than the legally permitted number of rounds is a prohibited device. If people aren't deterred from committing one crime, they're not going to be deterred from committing two, three, four or five crimes.
To me, watching the Criminal Code get thicker by the year and not actually addressing the reasons that someone might commit this offence or not giving the police the resources to investigate these serious offences are real concerns.
I'd say this: If those offences do not already form the provisions whereby, as Inspector Rowe said, police can seek authorizations, whether they're search warrants or wiretaps, that's a good place to start. Creating brand new offences that target existing illegal conduct seems to me like a waste of time and energy.