this doesn't seem to be working, I'll hit the button, and then get kills and not achieve any unlocks for the snipers.
Currently my progress for the challenges is 9999999/50 or so. This is slightly over the desired fraction. Is there any way to fix this? And did I miss some sort of instructions to do after or before I hit the key?
1. Decide what weapon you want to update
2. Press the corresponding key for that weapon
3. Join a match - get one kill/headshot/accessory unlock
4. Repeat steps 1-3 untill all says 'DONE' in the Barracks.