Well, if they’re forced to use hand guns or shotguns, if nothing else it likely lowers the death to due to smaller magazine capacity for most hand guns. And sure, some would still buy them illegally. But not all. We are lazy people. If nothing else, this would at least add a roadblock or two and stop the impulse buys.
Again, some would, but it would stop others, or at least significantly slow them down, buying time for them to get caught.
If he bought it in a fit of rage as it appears, then making him wait even a couple of days might significantly reduce the chances of him doing so, yes. Make him cool his heels, have second thoughts.
also, why is there this narrative that someone, who from what I understand was a law-abiding citizen prior to this, or at least many of these other shooters were, would just magically know where to buy guns illegally? They’re not exactly setting up in parking lots.
there is of course, NO perfect solution and mass shootings will still happen. maybe the most tragic part of this is to say there’s nothing more to be done and throw our hands in the air about it. Other countries have addressed this, and either eliminated or significantly reduced the number of occurrences. But somehow that’s not possible here.