Gun show loophole, gun law loophole, Brady law loophole (or Brady bill loophole), private sale loophole, or private sale exemption is a political term in the United States referring to sales of firearms by private sellers or dealers, including those done at gun shows, dubbed the "secondary market".[1] The term refers to the viewpoint that a loophole in federal law exists, under which "[a]ny person may sell a firearm to an unlicensed resident of the State where he resides as long as he does not know or have reasonable cause to believe the person is prohibited from receiving or possessing firearms".