well it did it ranged like sniping and did a sweep across, if it didn't set the whole town in fire, it may had at least done a notorious damage to it.
But i believe that the town was empty and it was all a ruse in the middle of "Yukkuris of War" to make a scout team of the Easy Army give their position away so the easy mister tanks for blast them.
Can we really call a Dosu a heavy type? yeah it's bigger than other yukkuris and have the dosu spark, but it's basically a glass cannon with shit "HP" and shit "Armor" that an infantry heavy machine gun could make a short work of, And for something of that size to be killed by the typical machine gun that Rambo uses, well, you really have to start wondering if you didn't fuck up the "Stat points" distribution by having pure size and offensive power but barely HP and Armor.