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A large‑caliber, vehicle‑ or emplacement‑mounted electromagnetic weapon designed for sustained anti‑armor and anti‑air fire. Rail heavy machine guns fire massive, hypervelocity projectiles (e.g., 20mm flechettes or slugs) that can penetrate main battle tank armor and destroy helicopters. They require dedicated power plants, advanced cooling, and robust stabilization. In naval or ground‑based air defense roles, they can engage multiple targets with rapid‑fire pulse trains. The development of rail heavy machine guns is a major goal of directed‑energy and electromagnetic weapons research, with several nations testing prototypes on naval vessels.
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