Weaponsmith Archive

a guildmate of mine acquired this, and told me it's not a loot drop : It's a quest reward from one of the NPCs in the Genosian cave.

Also, from the sound of it, it sounds like the quest is a simple "delivery" quest

Its not a simple delivery quest. Its a find the code to enter this part of the complex while fighting tooth and nail for your very lives type of quest. Everyone who gets into that room and talks to the scientist can get the schematic.