Bioware has posted a brief look at the weapon tuning process, a way for players to customize their weaponry with nifty visual flair.
Players will first need to collect an item that has a Tuning Slot available. These can be found in the Cartel Market, PvP, Operations, Reputation Vendors, Flashpoints, Heroic Missions and Crafting Recipes. Weapon Tunings are only available on the Cartel Market in the Plunderer Pack that will come with the launch of the the next chapter, Profit & Plunder.
Giving a weapon the Tuning effect requires dragging it into the open slot and hitting "apply". That's all there is to it.
Get a look at some of the effects players will find by heading to the Star Wars: The Old Republic site.