This will be an atrocity. There are so many things that could be done to assure that this never happens again. But if there is mention of gun laws or anything to do with guns the NRA says NO.
They don't represent the majority of gun owners anymore. They respresent the manufactorers. Sooner or later, the NO, is going to start costing them memberships.
While we agree in essence, nothing will assure that mass killings do not happen again. Sure; we can mitigate the severity, by reducing the lethality of weapons the general public can purchase, which we've always done since nasty ones came on line: nukes, grendades, full auto, etc. And the only reason to bar ownership of nukes, grenades, etc, vis a vis "well regulated," is they're massively lethal.
Now too, are survival / assault weapons, as it turns out. So **** yeah; add them to the banned (from future sales) list. It's a no brainer, and might very well help, since making things more difficult to acquire reduces their use, and lowers our percentage risk, on something we cannot really prevent: some disenfranchised loser (millions are thus) turning into a sociopath bent on creating as much pain on their way out (very few of them). But with lesser-lethal weapons, fewer die, hopefully. Meanwhile, hunting, target shooting, protecting oneself, continue, unmolested, just as before.