Question

How feasible are electrostatic pellet guns?

Answer 1

answer:I will make the assumption you are interested in the “charged” portion of the “electrostatically charged metal pellets” in your question. We already know how to fire metal pellets electrically and can do it precisely to astonishingly high speeds. From your question I think you are trying to disrupt an electrical device activity at a distance. I do not know of a technology that permits captured electrons to carry any significant energy for a sustained period over a distance. Pith balls have a high stored charge to mass ratio but they do not hold it for long and their low mass does not permit delivery over distances. Mechanical energy in the form of kinetic energy imparted to a mass is quite effective at distances. Since you are trying to disrupt an electrical device I would suggest a projectile with an electrically conductive payload: carbon fiber nanotubes bundled in a regular pattern and packaged into a sabot with a timed disrupter A millisecond or two before impact the sabot opens and the carbon fibers tubes are delivered at high speed into the circuitry. The conductive tubes embed themselves and producing both open and short circuits in random locations resulting in device behavior that can include: no-op, unpredictable and uncontrollable, and total destruction. Wear your safety glasses.