Chang: "Lately the USN has been putting less pressure on maturing railgun technology and has, instead, also been investing on the development of the
FIVP (Hyper Velocity Projectile) which, it discovered, can easily be fitted in existing conventional guns." A technical document published in September 2012 by the Office of Naval Research (ONR) on the HVP describes it as: "a next generation, common, low drag, guided projectile capable of completing multiple missions from different gun systems," which include, in addition to the railgun, the US Navy's standard BAE Systems Mk.45 family 127mm weapon and BAE Systems 155mm Advanced Gun System.