So just bought this gun(viewloader lancer) from a friend. He said tat he used only 1 tank of 9 oz co2 which i believe because its in mint condition. So here is my question: I refilled the co2 tank and when i screw it into the gun it makes a hissing noise then stops. I cock the gun back and pull the trigger but no co2 comes back. Everything is working all right except no co2 comes out. Tried it with 2 tanks. Help appreciated.
inb4 noone knows