Things You'll Need
Instructions
Use soap and warm water to clean the pump-action water gun. Add the soap and water to the gun and press the trigger multiple times to remove any dirt that may have gotten inside the gun.
Acquire metal tubing that is slightly larger in diameter than the ball-bearing pellets or BBs you will be firing.
Cut the metal tubing to an 8-inch length with a saw.
Apply a small amount of industrial-strength glue around the barrel of the pump-action water gun. Avoid getting glue inside the barrel of the gun and over the opening where water exits the gun.
Secure the metal tubing onto the barrel of the gun. Hold the metal tubing against the barrel for a couple of minutes until the glue sets. Allow enough time for the glue to fully harden.
Load the rifle by placing a ball-bearing pellet into the metal tube.
Aim the water gun towards the target and pump the water gun several times. Squeeze the trigger quickly when you are ready to fire the pellet.