As a former employee of a gun dealer, I can tell you it is always under the store’s discretion whether or not to sell you the gun. If you get any kind of a weird vibe about a customer the law entitles you to say no.
Only did it once. A guy came in dressed in camo fatigues and a Cleveland Indians cap and began doing close-order drills with a rifle he was examining. Kept pestering employees to remove the trigger lock. Chased him out of there and insisted that nobody sell him a gun.
If I was a long time Indians fan, I can see that eventually that would put me over the edge ;)
I was wondering about this. I can imagine the perp saying he wants to shoot the voices in the walls, but his background check passes. What does the FFL do? Could he get sued? I could just hear him say he didn’t make the sale because he was black.