Why do you want magnetic weaponry so much? 
'sides, I havent laid out everything yet. Although now I'm certain that the most advanced of tech won't be utilized. I want things like gauss rifles and plasma cannons to be special, advanced technology that you have to fight tooth and nail to acquire. If you start with things like that, what's the point in getting loot? you already have a gatling laser, why care about a magnetic gun? No, I like a sense of progression to be apparent. I've gone through it, and I tell ya, the day you throw out that craptastic hunting shotgun for a railgun is immensely satisfying.