I think your space key is broken.

As for the content, it won't help, there are already 999,999,999.99 guns in the USA and they won't go away and criminals can get illegal guns all the time anyway. Despite that, any law that doesn't make criminal gun ownership go away within the current election cycle is completely useless because seriously, who wants to make the world a better place for today's spoiled brats children?
Oh and you focus on mental health checks, but what exactly makes a person mentally ill and how are all murderers mentally ill? Is there even any research as to how and why murders are mentally ill and how to find out before they kill people? Will socially isolated people be called mentally ill from now on?