I wish some dem would do this near me. I would get all my gunny friends and go try and buy it, While filming ourselves, saying some version of "Gee this is awesome, the gunshop turned me down", " I never thought I'd be able to get one after that Felony DUI Plea.", or "My neighbors in Montana will never believe the deal I got when I get home". Then agitate loudly and publicly for prosecution.
18 USC 922 (d) says: "It shall be unlawful for any person to sell or otherwise dispose of any firearm or ammunition to any person knowing or having reasonable cause to believe that such person— etc." It doesn't have to be true.
The idiot part about these stunts is the dems have no idea how many laws exist around the selling of firearms.