So those that survive this will be those who can grow their own food... and protect themselves. Which, incidentally, is why I want a gun. Not to protect myself from tyranny, but to improve my chances of survival in the event of the collapse of civilisation. I'd want to be able to hunt, and protect myself and my resources.
Based on your location, I recommend you take a look at harpoons, Aquaman.
The strengh of a hero is defined by the weakness of his villains.