In morroblivion, the weight of the Glass Long Sword is 40 (http://steamcommunity.com/sharedfiles/filedetails/?id=243746579), in the UESPwiki (for morrowind) it's much less (12) http://www.uesp.net/wiki/Morrowind:Glass_Longsword#Glass_Longsword. Is that normal ?
Thanks
It's because Morroblivion
It's because Morroblivion actually uses Oblivion version of glass longsword. (this is also true for many other weapons)