This is a stupid idea.
I understand the idea, that this will allow even longer ranger sniping, but this technology already exists in antitank guided missiles, out to at least 5000 meters.
If you replace the missile warhead with an inert one, it eliminates the collateral damage problem, and a 500 km/h 10 kilo missile hitting someone will make them even deader than a .50 cal round. It’s something like dropping a safe from a second story window on them.
This is just another hole in which the military dumps money so that generals can get cushy jobs after retirement.