The shotgun does not have a catalyst slot, shown below. http://i.prntscr.com/X4RzZnfAQAeolCthviLxrw.png The shotgun also does not show up in my collections show in this URL. http://i.prntscr.com/tQneQrSBS3mQnKSEup4QYQ.png I'm not really sure how to fix this or what to do to unlock this weapon. I am currently playing on PC and transitioned my blizzard account to steam so maybe it got broken during conversion. As I stated however I don't know what the issue is beyond this point.