"and you are not going to win any war with this toy, even if all your enemy has are rocks thrown at you"

I don't want to use it for war. I think it would be a pretty cool technical project (if it works).

This design is pretty clearly optimized for weaponry. Eg the foldable fins - necessary if you want to keep a magazine of these things stored compactly before firing. Totally unnecessary for funsies.

What nonviolent application are you imagining for a gps-guided rocket that is launched by pulling a gun trigger on a hand held mount?