Quote Originally Posted by Husar View Post
As for deflecting AK rounds, I don't see why anyone would want to. Seems like a waste of active countermeasures if even bots of mediocre size can probably be armored well enough while the AK can also fire a lot of rounds and active countermeasures are often limited in use.
They are more likely to be used against tank rounds and other large caliber projectiles.
Armour will slow a robot down, and will often have weaker spots. The right kind of particle accelerator (think e.g. a miniature railgun) should be able to accelerate small pieces of metal to a high enough velocity that they could deflect AK rounds. The smaller the pieces are, the more can be carried. If each robot carries 500 pieces each, then a squad of 5 robots can deflect 2500 AK rounds, which corresponds to quite a few AK magazines.

If the robots are quick (which is easier with less armour) to disable identified targets, then not that many counter-projectiles need to be fired, anyway.

There will of course be downsides and upsides regardless of which design one chooses.