Sci-fi weapons are a common trope in science fiction, often used to add an element of danger and excitement to the story. Lasers, phasers, and rayguns are all examples of sci-fi weapons. Lasers are beams of light that can be used to cut through objects or cause damage to living things. Phasers are energy weapons that can be set to stun or kill. Rayguns are handheld weapons that shoot out a beam of energy. All three of these weapons are staples of the sci-fi genre.