Xur is in the Tower in Bungie’s Destiny. You know the drill by this point. Find him just across from Lord Shaxx, right next to the Crucible Quartermaster where he will remain until February 28th, 2 AM PST.
This week, Xur is selling the Ruin Wings (Titan gloves), Mask of the Third Man (Hunter helm) and Light Beyond Nemesis (Warlock helm) for 13 Strange Coins. Each is worthwhile in their own way with Mask of the Third Man and Light Beyond Nemesis being highly recommended for their classes in PvP.
As for the Exotic weapon this week, it’s the Truth. This rocket launcher is no Gjallarhorn but it still sports proximity detonation and ridiculous tracking that will pursue your enemies into the next life if necessary. It can be yours for 23 Strange Coins. The Legacy engram this week is a Heavy Weapon engram though in case you really want Gjallarhorn and don’t mind spending 31 Strange Coins.