A railgun is a type of electromagnetic weapon that uses magnetic fields to launch projectiles at high speeds. It consists of two parallel conductive rails and a sliding armature that connects them. When an electric current flows through the rails, it generates a magnetic field that propels the armature and the projectile forward. Railguns are known for their potential to achieve velocities much greater than traditional firearms. They are often discussed in military and scientific contexts, with applications in naval warfare and space exploration. Research continues to improve their efficiency and effectiveness for future use.