Things You'll Need
Instructions
Place the Vulcan Nerf Gun on the floor. Locate the cover of the battery pack, located just above the end of the trigger.
With a Phillips-head screwdriver, unscrew the single screw which holds the cover over the battery pack of the Vulcan Nerf gun. Set this screw aside so you can reattach it later.
Pull the long battery pack out of the Vulcan Nerf gun. This battery pack will have room for 6 D-Cell batteries. Properly install these batteries in the Vulcan Nerf gun. Make sure the positive and negative ends of the batteries are facing the right way.
Slide the battery pack back into its proper place in the battery pack by inserting the metal ends first. Test the Vulcan to see if it fires. If it does, reattach the cover with the single screw. If it doesn't fire, check that your batteries are inserted correctly and repeat this step.