How can I get the vulcan 6 blueprint?

It is said to be found in the Vulcan R3-7 container. But I don’t know where to get it. How do you get it?

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Select rank 13+ reward in regular tasks window “Win in a Special operation on rank 13 ship or higher”

you can buy the container if you win the mission for 100 irridium.

the container CAN contain blueprint for rank 6, 9, 13, 17 vulcan blueprint

The fastest way is to just buy it for gs in trade