This challenge is part of the Mandalorian XP Quests. You'll have to find Beskar steel deep in the belly of the Shark landmark to make upgrades for your armor!
Here, the Shark's entrails refer to the basement of the place that was ravaged by an explosion. You'll have to venture into the old chest of the building.
Where to find it?
The chest is located on level -2 of the structure, south side. It doesn't contain any treasure... except a plate of the precious Beskar steel.
Once inside the chest, you'll find the Beskar steel on one of the metal shelves.
All you have to do is grasp the plate by interacting with it, and that's it! Your quest will be completed automatically and you'll be able to equip your Mandalorian skin with another armor upgrade.
It's not complicated in itself, but as is often the case with other players, you may have an issue. During Season 5, many of them will want to complete their quest for Beskar.
Try to get a weapon to defend yourself as quickly as possible. You can also try to rush into the chest directly, to complete the quest instantly, but nothing guarantees your survival in this case!
Original content by Romain "Zorg" Becquelin.