Plutonium

Hi, I'm trying to unlock all the camos by myself and I do not want to use some code in the console.
Basically, everything seems to work well except for the DSR and the "art of war" camo (which requires a certain number of kills without perks).
I removed the perks and started to pley, but the number of kills remains 0, therefor the camo is not unlockable.
Do you know if there is a way to fix this?
Thanks for your attention.