I don't think it's in any way relevant, to be frank.
There are many documented instances where this style of weapons has been used in mass shootings in Canada and around the world. I personally believe that there is no place in a civil and safe society for such weapons. They were designed for military use and not for recreational use, and there have just been far too many tragedies where they have been used.
I still do not have all the particulars on what weapons were used, and in what circumstances, in the Nova Scotia shooting, but I also believe that a mass shooting was symptomatic of a greater problem.