https://blogfreely.net/dangers....lope51/15-up-and-com
Throne and Liberty Gear Upgrades Upgrades can increase the stats of a piece of gear and, sometimes, even add extras. The value of these upgrades is determined by the levels of gear, their requirements, and the number of random augmentations are applied. The elite racial Shield Razortail, for example, is often upgraded to increase its lightning absorption function in PvP, and/or to provide additional defenses to missile-based build in the PvM. This makes it more tradable than the perfect non-upgraded version