It turns out the left wing Warren supporting Dayton shooter used an illegal gun

Psycho criminal mass murderers don't usually obey gun laws.

In the state of Ohio, he illegally turned that into a machine gun. Inserting a magazine greater than 30 rounds instantly classifies it as an "automatic firearm"

In the State of Ohio:

"'Automatic firearm' means any firearm designed or specially adapted to fire a succession of cartridges with a single function of the trigger. 'Automatic firearm' also means any semi-automatic firearm designed or specially adapted to fire more than thirty-one cartridges without reloading, other than a firearm chambering only .22 caliber short, long, or long-rifle cartridges."