Title II weapons, or NFA firearms are designations of certain weapons under the United States of America's National Firearms Act (NFA).
These are weapons requiring a Type 01 Federal Firearms License (FFL) as well as a Class 3 Special Occupation Tax (SOT) to sell, and an ATF Form 4 (transfer of registration) with $200 tax stamp to purchase. The restrictions apply to certain firearms, explosive munitions, and other devices which are federally regulated by the NFA. Any violation of the NFA is a felony punishable by up to 10 years in prison. Per the National Rifle Association's Summary of Gun Control Act of 1968:
Title II of the Gun Control Act of 1968 is a revision of the National Firearms Act of 1934, and pertains to machine guns, short or "sawed-off" shotguns and rifles, and so-called "destructive devices" (including grenades, mortars, rocket launchers, large projectiles, and other heavy ordnance). Acquisition of these weapons is subject to prior approval of the Attorney General, and federal registration is required for possession. Generally, a $200 tax is imposed upon each transfer or making of any Title II weapon.
The Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF), which enforces federal firearms law, refers to such weapons as "NFA firearms". NFA firearms include machine guns, short-barreled rifles and shotguns, heavy weapons, explosive ordnance, silencers and "any other weapon" (AOW), such as disguised or improvised firearms. Title I weapons or GCA firearms are standard rifles, shotguns and handguns.