Shield Tanks
Instead of just mere Mechanoids and vehicles surrounding Mount Sunn Workshop, the enemy had finally brought proper equipment into the fray. Some kind of tanks which Jin had no knowledge of were placed in the front of the lines. It was until Nie told him more about it that he realised it was finally acting as a tank in most MMORPGs.
As the name bluntly reveals its nature, it's a shield tank where the tank itself was equipped with a shield generator instead of a barrel. While it still has machine guns and an unmovable barrel placed right at the side of it in case it requires to fight against other tanks, its general purpose was to generate a shield which would help adsorb the kinetic energy of the bullets and shells that were coming in their way.