Alas, many residents of liberal socialist cities such as Montreal would not understand such things. The AR15 is clearly the cause of violence, created when the hypothetical teen fell in love with it while playing call of duty at wallmart.....;-).
Liberal socialist Montreal is the major city in Canada with the most guns so we love them and have many of them. But I would never want my country to be US 2.0 and have a school shooting every 2-3 days.