SMG. Basically an epic bullet hose. Very high to maxed out RoF, low impact. Imagine it with persistance and armor piercing rounds. Great at point blank to short range. I want exotic sniper that goes in the heavy weapon slot. Think of it like the anti material sniper from mass effect. Very high to max impact, high to very high recoil, low magazine/reserve ammo. Either 1 or 2 in the mag and maybe 5 shots total. Solar or arc damage. Or if I were to completely ridiculous, something along the lines of tungsten armor piercing rounds that ignore shields. The balance would be the high recoil and low stability. Hard to aim but rewards precision hits. It would hit like -blam!-ing mack truck. I also wouldn't mind seeing some full auto side arms. Akin to the glock 18. An exotic scout similar to how NLB was. Maybe like a throw back to the M14.