According to the North Carolina Department of Adult Correction, somebody with Routh’s same full name and date of birth racked up more than a dozen criminal charges in 2001 and 2002, including for carrying a concealed weapon and hit and run. He also picked up a particularly alarming felony in April 2002 for “possessing a weapon of mass destruction,” records show.
Oh I've seen this one before! The next part is 'The FBI knew about them and did nothing'.
via the NY Post
It was a machine gun, they just called it a "weapon of mass destruction" because everybody was that kind of retarded in 2002.
Be a right winger, saw a shotgun 1/16" too short: see your wife's head explode via a FBI sniper round.
Be a right winger, sell a firearm component approved by the ATF: die in a flaming pyre while the ATF take selfies.
Be a left winger, own an unregistered machine gun in 2002 and have a standoff with the cops: make all the contacts and become a deep state actor.
If it was a squad weapon, I can see how it gets that designation. It's more than "arms" potentially. "mass" is open to interpretation.