Quoted:
"Basically at least two students and probably more were able to run away while Harris' attention was shifted to the deputy. Just because a school resource officer doesn't shoot and kill the active shooter doesn't mean that their presence there didn't save lives!"
this is why we NEED hi/standard cap mags. suppressing fire, used by those on the defensive, to move away from the threat.
not all rounds fired in anger are "kill" shots.
The anti's will claim that is just spraying bullets, with no concern for how many innocent bystanders are hit.
Better to point out that handgun rounds rarely result in one hit completely incapacitating the target, and the chance that there will be more than one attacker. You would rather not have to worry about doing a mag change with another attacker coming at you.
Or just point out that their "clip size" limit wouldn't have prevented anything, since the Virginia Tech nut used a bunch of 10 round mags.