Step 1: MAKE VALVE CONNECTOR
Step 2: PLACE CARTRIDGE AND PREPARE MATERIALS
Step 3: ASSEMBLE YOUR GUN
Once that is done, connect barrel to the gun with hinges.
Step 4: LOAD AND SHOOT
First you'll need to put some rubber bands on, to secure barrel. then pull barrel down to be able to load gun with dart. Then release air from Co2 cartridge into a duster gun. PULL THE TRIGGER and shoot. :)