A gun shop is read symbolically as the wish for protection and power, or as aggression that feels close to the surface. Dream books take it as a question about defence and control, not as a call to act.
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.