I say everyone needs to buy some guns......when end times comes, jiu jitsu alone will not stop your neighbours when they show up at your door to eat you. Your going to need some firepower behind ya !!!!!!!! LOL.
For training I suggest watching: The Road
The Book Of Eli
Zombie Land
I have been useing guns as long as I have been doing Jiu Jitsu. Love a good weapon almost as much as a perfect Rear Naked Choke.lol.