26 U.S.C. Sec. 5861(j) is a federal statute that prohibits the transportation, delivery or receipt of an unregistered firearm. This type of law applies to any firearm that is not registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). The types of unregistered firearms include machine guns, short-barreled rifles, short-barreled shotguns, silencers, or destructive devices. This law imposes criminal penalties for anyone who is found guilty of transporting, delivering, or receiving an unregistered firearm. The penalties can range from imprisonment to fines or both.