US Could Get 32-Megajoule Railgun That Kills Missiles at 6 Times the Speed of Sound The United States is developing a 32-megajoule electromagnetic railgun capable of launching projectiles at Mach 6, using electromagnetic force instead of traditional explosives. This extreme speed allows the weapon to destroy missiles through sheer kinetic impact. Railguns offer a major advantage in missile defense, especially against hypersonic threats that are difficult to intercept with conventional systems. W