The incident occurred on Thursday at noon.
Police say Garda armored car employees were making a delivery of cash to the PNC Bank on 401 Tabor Road when they were approached by two unknown robbers.
One was armed with a shotgun and the other brandished a semi-automatic pistol. They demanded cash.
After obtaining an undisclosed amount of cash, the suspects fled in an early to mid 2000 model year maroon four-door sedan, possibly a Chevrolet Impala with tinted windows, driven by a third person.
They were last seen headed east on Tabor Road.
Suspect number one is described as a black male, early to mid 20's, 6' or taller, thin build, wearing dark clothing with a mask, and armed with a shotgun.
Suspect number two is described as black individual, early to mid 20's, 5'8" to 5'10", thin build, wearing jeans with a white belt, "PUMA" hooded sweatshirt and armed with a semi-automatic handgun.
There is no description of the third suspect, the driver.
Police say if you see these suspects do not approach them, contact 911 immediately.
To submit a tip via telephone, dial 215.686.TIPS (8477).
Garda is offering a reward of "up to $50,000 for information leading to the recovery of the stolen funds and the arrest and conviction of those responsible. The company reserves the right to allocate the reward among multiple sources of information."