“Weapons that have a Tuning Slot come from many different sources including the Cartel Market, PvP, Operations, Reputation Vendors, Flashpoints, Heroics Missions, and Crafting Recipes. […] Next, you’ll need a Weapon Tuning. They are currently only found in Cartel Market Packs. The first Weapon Tuning, Lightning, is available in the Plunderer Pack which launches alongside Chapter XIII: Profit and Plunder.
“Once you’ve got a weapon with an open Tuning Slot and a Weapon Tuning, combining the two is as simple as making any other modification to your weapon. First, CTRL+Right-click the item to open up the Field Modification window. You can also take it to an Item Modification Station. Then simply drag the Weapon Tuning into the open Tuning Slot and hit Apply. Your Weapon will automatically begin using the effect created by the Mod!”
And yeah, that great disturbance in the force you just felt was Reddit reacting to the part where tunings come only from gambling lockboxes.
Is Weapon Tuning purely cosmetic?
Yes, they do not affect the stats of the weapon in any way.
Will we be able to modify existing weapons?
Many of the existing weapons you have will support the Weapon Tuning slot, but not all. We will continue adding them to existing weapons over time and all new weapons introduced will have this slot.
Are they exclusive to the Cartel Market?
The Lightning Weapon Tuning is exclusive to the Cartel Market, but there may be future Tunings available from other sources.
Are they affected by Color Crystals?
Will Tuning effects stack with existing weapon effects?
Can we turn the effect on and off like a flourish?
No, similar to existing weapon effects, when the weapon is drawn the effect will always be shown.
Are Weapon Tunings destroyed if removed from a weapon?
No, they are removable from weapons just like other mods and for the same cost as extracting a Color Crystal.