How could I get more weapon slots without buying any in Warframe?

On at 6:04 PM, Tesla_Reloaded said: You need to unlock the Steel Path to gain access to weapon arcanes Not entirely true They are

You have to unlock Steel Path before being able to use it -Seems like an oversight that DE allowed Acrithis to sell the thing before the

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warframe how to unlock weapon arcane slot Hi all! Today we talk about how to get the Primary Arcane Adapters in the game, rather than