There is no loop hole in internet sales of firearms. In order to ship said weapon to the purchaser the seller must use a Federally licensed dealer who must send it to another federally licensed dealer. When the Buyer arrives to pick the weapon up all forms required by law must be filled out. A background check is conducted at that time.
As for Gun shows all federally licensed dealers working a Gun show MUST conduct background checks on anyone they sell a firearm to. The only exception is a private individual selling his private weapon. And a booth cost around 150 to 200 dollars, joe blow isn't gonna be selling a couple privately owned weapons at that cost. Further anyone that routinely does buy a booth and sells mutliple firearms will be investigated by the law and forced to either cease and desist or get a federal license. ATF frowns on anyone selling more then a couple guns a year without a license.
As for Gun shows all federally licensed dealers working a Gun show MUST conduct background checks on anyone they sell a firearm to. The only exception is a private individual selling his private weapon. And a booth cost around 150 to 200 dollars, joe blow isn't gonna be selling a couple privately owned weapons at that cost. Further anyone that routinely does buy a booth and sells mutliple firearms will be investigated by the law and forced to either cease and desist or get a federal license. ATF frowns on anyone selling more then a couple guns a year without a license.