it's a badly enforced one, and only at the state level. this is why it is necessary to create a federal standard of what constitutes straw purchases, and give it the teeth and funding to take guns out of the hands of criminals. but you'd rather see those criminals armed and dangerous because you can't justify having a gun for self defense otherwise. straw sales account for almost half of all guns used in crimes, but i'm sure you'll still find a reason to prevent its practice.

i'm not sure what could be a more compelling reason for smaller magazines when many of the last massacres took advantage of the larger magazine capacity to kill more people before they could be stopped. again, the idea is to stop the fatalities of gun violence. i'm not sure why having more carnage is a constitutional requirement for having guns so much so that we can't find ways to limit it. every other country which allows its citizens to have guns can see that there are steps we can take to reduce the damage they do, but it's people like you who prevent us from doing the same here in America.