Please advise what you would use this for. No, not on the market for obvious reasons.
Given the propensity of police to abuse the population with their toys, I can see why it would be a problem. However, the seemingly obvious utility in some situations means that such devices are inevitable. The same for taser-equipped robot dogs or other robotic devices.
The bigger problem comes in making weapon-equipped robots that have AI to make them autonomous.
@Darren316 One of the more amusing (for me) moments in the recent Congressional questioning of Pentagon officials regarding UAPs occurred when the official inferred that the objects in the infrared video were drones. The problem being that no one has drones that can hang out for hours at a time, plus the fact that the objects hovered without any visible means of propulsion.