What if we all needed a permit to purchase gun accessories like bullets and gun powder and shells, do you think that would be a way to control guns?

There's no argument against people who behave law abidingly !
The questions is, what can you do to prevent murder with a gun on such an unprecedented scale ?

And as with ALL laws, you have to legislate for the asshole; the moron; the idiot; the criminal. Not the law abiding !