The men burst into the Wawa at about 1:45 a.m., on Route 202 at Naamans Creek Road in Concord.
One of the men with a silver handgun, waved it around as the other took money from a customer.
Then both men robbed the safe and cash registers.
The gunmen then ran out of the store, jumped into an Acura TL and sped north on Route 202.
No one in the store was injured.
Pennsylvania State Police have released a partial description of the suspects, saying one is heavy, the other lean, and both men wore black and grey hooded sweatshirts.
