The weapons are the same as ships use. Players may take weapons from their ships and place them on the bases, or vice-vera. Area control, resource wars. Cruiser buster, some frigate stuff. The final word.
Mass addition is greater for large ships because they add more fighters.
Other modifiers may still be applied. Small, weak, fast, cheap. Armed with a subset of the weapons available to the ships and bases. Can add shields, weapons, storage, repair, or fighters. MUST add mass.