A science-fiction ray gun is read as power at a distance, often playful rather than menacing. Dream books link it to quick decisions and the wish to settle conflict in a flash.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.