It happened around 3 p.m. on February 9 at the mall's Green Parking Garage on N. Gulph Road.
Two suspects in one of the vehicles were quickly arrested.
Four others were apprehended after a foot chase, according to investigators.
Police say each of the four suspects tossed a stolen firearm while trying to flee police.
The suspects are facing a long list of charges including unauthorized use of a motor vehicle, persons not to possess a firearm, firearms not to be carried without a license, receiving stolen property and evading arrest.