Admittedly a small screen but my first impression was the gun was an Uzi.
The screen shot someone else added adds some uncertainty...
He wielded it pretty effectively one handed, but he was a big guy.
The fact that he was climbing out of the car while still in a sideways skid make me think he probably was a drug runner used to situations like this...
Did he shoot the officer who was on the ground behind the ramming pursuit car too?
