I am on PC (Steam) and I can’t unlock the KTS100 MK8

I'm having the same issue on the EA App along with the other weapons I unlocked after the lower the requirement. I was close to unlock the KTS100 MK8 anyway, so this sucks that after the update that I can't it. 

Same thing here.  Was almost there and now it remains locked.

Same and also my beacon wont unlock

I have the same problem, I have completed the challenge and and it is displayed, but the weapon remains locked. None of the fixes work You can do better DICE! This is not acceptable.

Same 4 me. Weapon assignment Bullet storm 1 marked completed KTS still isn't available in my Loadout.