I modified a Zokesian missile truck, the Weaver SPG, to fire my Kingslayer missile. The Ravager Mk III, a Weaver SPG with a Kingslayer, is proven to be able to fire over 11 km. No doubt if the Kingslayer hits its target, it'll do some damage, judging by the fact that it can go several hundred m/s (Highest recorded speed: 476.7 m/s). I can prove it with screenshots if I have to. Fastest recorded impact speed: 296.9 m/s. I would not want to get hit by one.