Kevin Corbett, 39, fired the pellet from a dark BMW on Center Avenue outside the Downtown Dhaba restaurant shortly before 7:30 p.m., responders said.
The victim, who was wearing glasses, sustained facial injuries that didn't require hospitalization, Police Chief Michael Pontillo told Daily Voice.
A Westwood police officer recognized the vehicle description and Hillsdale police took Corbett into custody moments later.
The weapon was recovered once detectives obtained search warrants.
Corbett was issued summonses for aggravated assault and weapons possession, released under New Jersey's 2017 bail reform law and taken to New Bridge Medical Center in Paramus for an evaluation.
Airsoft pellets were recovered at the scene, responders said, adding that Westwood police also secured surveillance video.
Hillsdale police had the vehicle impounded.
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