Saw the latest page of Outsider and was glad to get a look at human small arms. If I may ask, what is the biggest nastiest gun a human ground pounder could use against a hard trooper?
They'd have a variety of weapons, but if the combat is on the ground rather than aboard ship, their best man-portable weapon would probably be a man-portable cannon or something similar to the smartgun used in Aliens.
Would the human soldiers have access to exo systems (not to be confused with powered armor) to help them bear more weight?
They might have harnesses like the ones in Aliens, but I don't think wearable powered exo frames are practical. That is, if a weapon is too heavy to carry and it needs a robotic chassis to carry it, then it would be much cheaper and more capable to just have it be robotic; no need to try to cram a human in it.