Responsible gun owners have a duty to keep guns out of the hands of criminals. If you are forced to surrender your guns against your will make sure they are useless. Just in case they get lost on their way to be destroyed. For safety.
A dab of JB weld in the chamber should do the trick. Once the bolt closes, it ain't ever shooting again.
EDIT: To all the folks saying "Muh 1776!"... Only a small percentage of Americans went to war with the redcoats. A lot of people comply, for many reasons. This is for them, retailers especially, they can at least guarantee these guns don't go to Ukraine, Syria, ISIS, Gangbangers, etc.
Oh, yeah and that mass shooting seems to have been the RCMP themselves. The guy they said did the shooting was paid off like 400k the week before the shooting by the RCMP, they claimed the guy had a replica police car 🙄 and then they were seen torching their cars after the murders.
Next the government banned all the guns. Problem, solution. Like in New Zealand with the hoax mosque shooting, or Australia, where they brought in Mossad gunmen to mass murder innocent civilians and then pinned it on a mentally disabled guy they said was a gun nut.