Other than this: https://www.mpgh.net/forum/616-call-d...ity-1-1-a.html
No.
Weapon XP on MW3 (MW2) was Client Sided, what it means is that the info is stored locally, on your PC, and sent to the servers as you start the game so you can do whatever you want with them. On Black Ops (1 & 2) they are server sided, Weapon XP (as well as your XP and lots of other stuff) is stored on TreyArch servers and (a copy) is sent to your PC as you start the game even if you change the data, you're only changing what was sent to you, not the "real" data.
/Closed