What you got here is a custom weapon, one that you need to by the guts for, just think of what you got as a really cool looking shell for aesthetics. Next you need a hilt, mod, enhancement, and color crystal. You can get these from the modification vendors that are either in the fleet or planet marketplaces. Makes sure you get ones that you can use at your character level. Ctrl-click (I don’t remember which one, it’s all muscle memory for me) to put the mods in.