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A compact, fully automatic electromagnetic weapon that fires small‑caliber flechettes at high velocity, analogous to a submachine gun. Rail SMGs trade power for portability and rate of fire, using miniaturized rail assemblies and capacitor packs that provide short bursts. Effective range is limited to 100‑200 meters, but within that envelope, they can defeat body armor and soft vehicles. The high rate of fire and low recoil make them ideal for close‑quarters combat and special operations. Real‑world rail SMGs are still in the concept phase; the challenges of miniaturizing the rails and capacitors are formidable.
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