I think you guys are missing the point about the ERPPC being far superior.
Oh I know the ERPPC is superior, even needing heat sinks. I was just trying to figure out why the Gauss was given as an option when it's almost physically impossible to carry one. That's like coming out and saying a 30-ton mech can carry an iHGR. Of course it might be able to squeeze on in, but it's so heavy the mech is effectively unusable in combat.