(adsbygoogle = window.adsbygoogle || []).push({}); Well i have no idea how this happened but I have the dead silent pro challenges unlocked but i dont even have dead silence as a perk itself unlocked and I have been doing challenges for it, anyone know why cause if so we could replicate it to get easy xp early

One thing I do know is I have been completing the challenges when playing infected

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Same happened to me, I was playing infected and jumped off a staircase and got the 'featherweight' challenge. I was rank 21..Very unusual.

It's because you get Dead Silence and other perks given to you in infected regardless of your rank.