I’ve been using the emp bionic and its kind of confusing. If I’m right next to a robot, it tends to damage/kill it - which more often than not causes them to explode violently, which is bad. I kind of hoped it would stun robots, but that is not the case.
Its aim/range is completely unclear as the emp bionic just asks you what ‘direction’ you want to fire in, and displays no effects at all, so I don’t know if its a cone, a straight line, or just an adjacent square or what.
What I do know is that its mostly a bad idea to use it, unless you like being caught in explosions. Whatever its range is, it seems too short to be effective. I generally prefer emp grenades.