Two males entered the station on Ballarat Road, Maidstone, at about 10.10pm on January 4.
They approached the attendant and jumped the service counter.
One man carried what seemed to be a handgun, whereas the opposite had a big kitchen knife and threatened the attendant.
They demanded money and cigarettes earlier than filling a bag with cigarettes and vapes.
They had been final seen fleeing on foot southward on Whittaker Street.
One of the boys is described as being of Caucasian look, with a darkish hood pulled tight over his head, sporting a high-vis yellow shirt, and about 20 to 25 years previous.
He was brandishing a firearm and carrying a see-through satchel bag.
The second man is described as being of Caucasian look with a motorbike helmet protecting his face, sporting a high-vis orange jacket, and about 20 to 25 years previous.
He was carrying a big kitchen knife and a backpack.
Anybody with data is urged to contact Crime Stoppers on 1800 333 000.
