Not a regular in any long range shooting forum. More toward the 'white cane' end of spectrum!
But though the following might be of interest. Current news, but sounding more like the old Soviet era "we're bigger, better, badder..." https://www.rbth.com/science-and-te...tim_recirculation&utm_campaign=Email
My vision of the tech referenced, either somehow ignoring Newtonian physics, supersonic shock area size of small city. Perhaps as "rail gun" tech, lethal wand reduced to fifty kilos or so with umbilical power supply comparably reduced to mounted on track-layer equivalent of semi-truck!
Any event ... 'Devil truly in details'! All such, further limited by "one man, one round!" Need to cart away carcass of shooter to be replaced by next in line drawn from protective bunker!
Just for interest!
Best & Stay Safe