I understand the intent, but feel that there are so many other loopholes that put much worse weapons on the street than a printer. Besides, my prints can barely sustain normal use, much less a bullet being fired from them. I would think that this is more of a risk to the person holding the gun than who it's pointing at.
All retailers are required to have a Federal Fire Arms license and background checks are required for all purchases made through an FFL. That means all gun show purchases made through an FFL as well.
The "gun show loophole" is a political myth used by politicians on the left to describe a legal purchase through a private sale, which may or may not happen out in the parking lot of some gun show. But not through a licensed vendor.
So when travelling with a straw man that big, make sure to look out for flying monkeys and green-skinned witches. Not to worry though, a fairly large percentage of your travelling companions will have their eyes peeled for anyone who's not white and acting outside their expectations.
The concern has always been unregulated sales between people who are not within the spirit of the exception, and it's a real risk, evidenced in part by the pedantic nitpicking that the right will do of every utterance even tangentially threatening to the sacred guns.
What is this straw man fallacy you're seeing? I haven't made any arguments; I'm simply stating facts about how legal gun purchases work in the United States.
They wanted to use all the buzzwords because "gun bad," they even implied "your kind" (and thus you) was racist with no evidence.