The four Philadelphia men are being held on $150,000 bail after a 13-year-old boy was robbed over the weekend in nearby Yeadon.
Police say two men, Ernest Barnett and Rashawn Mallory, approached the boy on Saturday evening and pulled a gun before rifling through his pockets. The men allegedly took his sandwich before fleeing in a car.
Investigators also say the victim had a cell phone in his pocket, but the thieves did not take it.
The teen then used that phone to call police, who soon located a car matching the description.
The Delaware County Daily Times reported that Mallory and Barnett were charged with robbery, theft, receiving stolen property, recklessly endangering another person and simple assault. Mallory was also charged with making terroristic threats and for carrying a gun without a license.
Graves and Smith were charged with criminal conspiracy to commit robbery, theft, and receiving stolen property.
Police say they recovered a gun and the sandwich.