According to a 19th district sergeant, the offender displayed either a "sawed-off rifle" or a sawed-off shotgun. The offender's face was covered with a purple rag that had eye holes cut out.
After receiving the cash drawer's paltry contents, the robber fled eastbound on Irving Park Road.
He is described as a white male, 43 to 50 years old, 5’9" tall, 190-200 pounds. He wore a dark tan or brown coat over a dark blue hoodie, dark pants, pink or red gloves, and he carried the firearm in a dark blue bag.
UPDATED: Added fuller description of the weapon.