My Plasma Caster. It's a very, very powerful Primary Kitgun, and I stylized it based on the plasma caster from Predator. Make sure to use bright shades of blue for the energy. ;)

Huge burst damage, infinite ammo. [Speed Trigger] (or Vile Acceleration) and Terminal Velocity make everything easier, and with Pax Charge, you'll never run dry while firing those big-boom charged shots. Quick shots don't stagger. Charged shots do.

I always take this with me with I do a sortie mission on the Plains of Eidelon, because there's nothing better than raining this plasma down on Grineer from the sky while protecting and escorting a drone. This is also amazing for holding down chokepoints.

If you want to do Corrosive or Viral, you'll have to replace [Hunter Munitions] or [Vital Sense] with the other element, though I've found that I don't want to replace either. I wouldn't recommend doing this without [Speed Trigger].