More proof that you are interested in the narrative and not a solution.
Banning high capacity magazines won't prevent murderers from using them. In fact, any ban will likely prohibit future ones from being purchased, while the hundreds of millions in circulation continue to be used. Oh, and you can 3D print them in case you want to. It will just make idiots on the left breath a sigh of relief while criminals keep on killing people. Well done, moonbat.
I do like raising the age to 21. That does help, and it absolutely should happen. Though soldiers can then fight and die in the endless wars of this country but they can't own a gun for protection in the country they serve. Seems a bit ass backwards, but hey! That's par for the course with legislation these days!