Twenty-eight year-old Tina Simpson was found guilty of two counts of possession of a controlled substance and criminal mischief under $20-thousand.
She received two years probation and will have to pay restitution to the victim.
According to an arrest affidavit, Simpson exchanged words with two other drivers while at a stop light.
It says she then made a U-turn and rammed her car into theirs.
Police say Simpson then pointed the gun at one of the women and threatened to kill her.