u/Copperbane

Well, i'm a new player (started on march) and was collecting some of the legacy rewards and decided to try to get the stovepipe chest apparel. After i selected the legacy mission a cutscene started... but... well, wasn't the Stovepipe one... Extrange. When i arrived to Conney Island i noticed no "story" mode, so did on challenge mode. Fun experience, hard as F for my level, died vs sparky some times but finally finished it.
In theory i received something, but i don't find any reward. The apparel is missing, no backpack throphy... just, completed.

Returned, and no master unlocked. So, propably cause i'm new there is something i'm missing.
This mission has master dificulty? is there something i need for get the chest apparel?

Thanks in advance.