6% DEX on rare gun?

From what I've heard, only the first line of potential is actually affected by the item's tier. The second and third line can have stats from different tiers and different rarities, but they're usually lower than the first line.

i feel the need to add that this isn't true, they can have from different rarities, but not from different tiers, a level 90 glove won't have anything that isn't 3, 6 or 9% (or any of the other level 90 potentials.)

that said, the item in the first post simply has a "epic" line in the third slot, can happen and has happened a lot.