You can't see the man's face in the surveillance video to the right of the screen, but you can see the gun.
Police believe the man used a type of machine gun to rob the Big M Market on Bryan Avenue.
The man points the gun straight at the clerk's head. Police say he demands the money, which he takes straight out of the register.
Police say it's not common to see a gun like the one in the video. They say this same gun has showed up at several other robberies around town.
Watch the video and help police figure out who robbed the Big M Market.