(DAILY MAIL) — A futuristic supersonic weapon which fires ammunition up to 100 miles is another step closer to being deployed by the U.S. Navy.

Officials have revealed an industry-built prototype of the electromagnetic railgun is now being tested at its Naval Surface Warfare Centre Dahlgren Division in northern Virginia.

The weapon, which it is hoped will be fitted on ships from 2017, uses a magnetic field and electric current, instead of chemicals, to generate energy to fire the rounds.

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