Totalitarian governments have already taken firearms out of reach for the people in most of the world and they are trying hard to do that in the US also. Therefore, stock up good hand guns, rifles and shotguns AND enough ammunition, hand loading equipment, gunpowder, primers and bullets while you can. There may be a day when you have to resort to different kind of weapons, like this. 

PART 2 ASSEMBLY INSTRUCTIONS

With this you will not need factory made ammunition and still have a fairly powerful weapon.