Word is he had prior assault charges and a no gun order but that's only what I hear; I have no link to offer anyone and can't swear to the above.
Just based on the manner of approach with the pulling over random cars, ordinarily I'd see that as a probable handgun. But who knows.
16 crime scenes as far as I know so far. Not sure how many had bodies. But at first blush I don't think it makes for a convenient case re: mass shooters/assault rifles.
My guess, though,is that not much information is out, not because the media isn't able to hype it, but because they aren't getting details from the RCMP.