Firearms already possessed Pre 1986 by civilians on Form 4s can still be transferred, but no additional machine guns can be transferred to civilians. In short, if it wasn’t on a Form 4 on May 19, 1986, it cannot be owned by a civilian. As any macro-economics 101 student can tell you, the machine gun supply has not been able to expand to meet demand. Because supply cannot expand, and is even contracting whenever a machine gun is destroyed, the price of available machine guns has continuously risen since May 19, 1986. If you want a machine gun, there is no time like the present to buy one.