The Ascalon Bow is unique amongst the bows. Given out solely by Collectors or as a quest reward, it can have the attributes of any specific bow class (depends upon where it is obtained from). All Ascalon Bows have the same appearance. Most quest reward Ascalon Bows also come with a weapon upgrade in the form of a Bow Grip. You can also add a Bowstring or replace the existing grip, however you cannot salvage an Ascalon Bow, even if you've added an upgrade to it.