Nothing, the war is being fought with the same old weapons, and the result is an almost complete resistance of the invisible «enemy». (organictalks.com)
You can upgrade your companion's weapons and armor too and even recycle older weapons, armor and upgrades to their original components, saving them for a new upgrade. (thekoalition.com)
What's great about the weapons (and armor) is that, unlike many other RPGs, you don't simply replace older weapons with newer, better ones. (wizarddojo.com)