I just turned what he specified into actionable language. Nothing more. I’m not trying to gotcha anyone. If Brainspore wants to ban all guns capable of a massacre on this scale then he will want to ban all self-loading firearms.
I confess, I did overdo it a bit. He’d probably be entirely okay with self-loading pistols that operate on a simple blowback system, i.e. in calibers like .32ACP or so.
