blue/silver version of set is from guardian tier 1 pvp gear
Loot drops from mobs, puzzles, cairns, etc starting around level 45
The chestguard drops from the final boss in Abysal Precipice on Normal or as a quest-reward from Shimmersand. It also drops from Emberlod Ereetu in normal Lantern Hook, called Fire-Emblazoned Chainmail.
The shoulders are also a quest-reward in Shimmersand or a dungeonquest in Lantern Hook
The gloves and legs are rewards from the dungeonquests for Normal Lantern Hook
The boots and helm are rewards from the dungeonquests for Normal Abysal Precipice
This model can be procured in many different ways and under many different names. It can be, however, fairly easy to determine if and item belongs to this set or to collect matching pieces by using the item icons as a guide. The icons for this basic model can be seen to the right. This is a general rule of thumb, though, as some icons in-game are mismatched and some alternate skins of the same model share icons.