Quest #29518 (possibly named "Rearm Reuse Recycle") doesn't exist. It may have been removed from the game.
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Rearm, Reuse, Recycle - Live
Rearm, Reuse, Recycle - PTR
Rearm, Reuse, Recycle - PTR 2
Rearm, Reuse, Recycle - Beta
Rearm, Reuse, Recycle - Cataclysm