A gun-toting thief stalked his victim from behind inside the Conway department store on the Fulton Mall on Feb. 12.

The victim told cops that the thief approached him at around 8:30 pm, flashed his Glock and whispered, “I have a gun and I will shoot you. Give me some money.”

When the victim tried to shortchange the thug, he said, “if you don’t want to give me the money, we could go outside where my boys are and f— you up and cut you.”

That approach worked, and the man handed over $300. The perp fled from the store, which is between Hanover Place and Bond Street.