David Olofson will go to prison because his AR-15 slamfired."
http://existingthing.blogspot.com/2008/03/david-olofson-on-cnns-lou-dobbs.html
To readers unfamiliar with this case, David Olofson, an Army Vet and gun owner, leant a 20 year old AR to (supposedly) a prospective buyer. The buyer took it to the range, and after firing approximately 800 rounds through it, the gun malfunctioned, fired two rounds, and jammed. Law enforcement took note, and called the gun a machine gun (because it fired more than one round per trigger pull), and charged Olofson with illegal transfer of a machine gun.
There is little dispute about the above. The government is knowingly making a felon out of this veteran because his gun malfunctioned.
Take note. If your gun slamfires, you're a felon.