The suspect was captured on surveillance cameras entering the store around 6:00 p.m. Thursday.
He approached an employee and demanded cash, then ran off with an unknown amount of money.
The suspect is described as a black male about 25 years old, 5'9"-5'10" tall with light facial hair and a stocky build.
He was wearing a dark-colored hooded sweatshirt with a logo on the front, dark blue jeans, dark colored boots and was armed with a handgun.
If you recognize him, you are asked to call police at 215-686-TIPS, text a tip to PPD TIP (773847) or through phillypolice.com.