Despite limited success in testing, the Navy railgun program has been fallen to budget cuts. The weapon was not slated to reach operation status until the 2020s, but congress has decided to kill the program.
“With the Electromagnetic Railgun, the committee felt the technical challenges to developing and fielding the weapon would be daunting, particularly [related to] the power required and the barrel of the gun having limited life.
More- Wired, Power Down: Senate Zaps Navy’s Superlaser, Railgun