I had the same Y-handled battery terminal brush that was used on the Back to the Future Delorean car. Tripped me out when I saw it in the movie for the first time. I thought, "hey...I have one of those in my garage!"
Not anymore. The blasters in the above pictures were made by the Disneyland Art Department in California and are rubber stunt guns cast off of the Master Replicas Stormtrooper E-11.