@Sean
Ahh, I see what you mean. Yes, that's an issue, although it's a funny issue. It can basically be applied to every weapon, therefore justifying not making any. Still, it's not 100% true, and designing weapons is fun.
I disagree with you that Space Magic is unreliable and unsafe. If the needle launcher that I described in the Heph thread worked as I intended, you'd still need to roll four or higher on a CON roll to kill a BS. A three or less probably wouldn't have done anything. The same is true for a microwave SM device, which would also be much cheaper.
As far as a SM device being unsafe, it's only unsafe if the user is very unskilled, very overskilled, or trying something very stupid. Those are border cases, and are balanced IMO by the fact that SM can do more damage to the enemy than guns, and are more versatile.
Lastly, I'm aware of the hammerhead. Along with the Automanip launcher I designed in that same competition, it's what I was talking about when I mentioned shoulder-fired weapons. As I said there, my main issue is that if you're going to fire it even twice, a PSL is cheaper AND more effective.
@Paris
Ah, okay then. I just remembered battlesuit armor being partially melted. I guess I got the scale of the damage wrong.
Anyway, I already have researched what a Battlesuit's weaknesses are. Primarily, it's the joints, and those are pretty much destroyable with any kinetic weapon that we use. There's no real chinks in the armor, although it's thickest in the front, and probably thinnest around the shoulders/hips. That doesn't really help, because a weapon that's useless if the battlesuit's facing you isn't that useful.
The microwave idea is interesting though. I doubt you could affect the internals, but maybe you could blind it? Maybe a specific setting on an overcharged Raduga would work?
The UWM uses PSLs, and plasma projectors. Which means PSLs, because plasma projectors are far too inefficient for my taste, and not much more effective.