I know this is a well-worn response to this type of comment, but just look at the rest of the world.
It isn't an either/or situation. You can implement gun control and resolve the conditions that lead to gun violence.
I'm in the UK, I have a 3D printer sitting right next to me in my home office. I have no desire to print a gun.
It shouldn't be a controversial statement to say that gun control leads to a reduction in gun violence - it's literally proven true all over the world.
I think they're for performing the vasectomies as alluded to in the second panel. I assumed the turps is for make-shift antiseptic.