u/sgerbicforsyth

Unlike all the other column headers which sort equipment low to high by name or weight or slot size, the tier header filters equipment by the tier you want.

So instead of having to scroll down to the clan grade equipment, which can be especially annoying for ballistics because there are too many varieties of AC, you can just set to only show tier 6 equipment! Now you only see clan stuff! So much simpler than regularly having to scroll down after fitting the first clan weapon you wanted.

Five years of playing this game and I only discovered it by accidentally clicking that header.