All four were caught on camera before the February 15th holdup at a take-out restaurant in the 1900 block of North 31st Street.
Police say the boy was inside the restaurant at about 7:30 p.m. when the four suspects approached him.
One pulled out a handgun and took the boy's money. All four then fled the area north on 31st Street.
Police have released the following descriptions of the men seen in the surveillance video:
Suspect #1: Black male, 18-23 years old, white jacket with a dark hood underneath.
Suspect #2: Black male, 18-23 years old, wearing a dark colored hooded sweatshirt and a knit hat.
Suspect #3: Black male, 18-23 years old, wearing a two-tone North Face jacket.
Suspect #4: Black male, 18-23 years old, wearing a dark jacket with the letter "H" on the front and light-colored sleeves.
Anyone with information about this crime or these suspects is asked to contact Detective Domenic or Detective Waring at the Philadelphia Police Central Detectives Division, 215-686-3093/3094.