you realize this goes every which way right
"Hey we should ban ARs okay cool"
"wait wait WAIT how did that couple get those ARs and shoot up their workplace people can't break the lawww"
yes but you have a brain and eyes and can read and understand the intentions of my post instead of nitpick on one part.
Making guns legal but certain areas illegal is near pointless because anyone can acquire a firearm and bring it into the illegal zone. It makes the law completely obsolete.
If you make the source illegal then people wont be able to acquire the guns anyways and will completely eliminate the need for a no gun zone in the first place