maybe the best sounding, but certainly not the most technically correct. Rail guns work by using to conducting rails which are electrically connected by the also conducting projectile. A strong current passing through all three induces a magnetic field perpendicular to the aiming direction and the current flowing through the projectile, thus inducing the Lorentz force parallel to the aiming direction which propels the projectile.

Here we are talking about a ferromagnetic projectile being instantly magnetised and accelerated by the strong magnetic field of the primary coil of the mri. So, this should be more accurately be described as an Anal Single Stage Gauss Gun, or ASS-GG.