Images:

gw2-exterminator-riflegw2-exterminator-rifle-2gw2-exterminator-rifle-3

Set:

Slot Item Name Trading Post Preview Code
Rifle  http://db.dulfy.net/item/44974 GW2 TP [&AgGurwAA]

Where to Obtain:

Champion loot bags: Embroidered Belt Pouch