Hello TTG im xboxRGH,
Today i will be doing a recovery service and i will give you one of the clan tags below, if you do not trust me with your account you can just read the tutorial below on how to do it your self, i would have to recover your account to be able to do the glitch.

Clan tags you could have:
You can have any clan tag that you want put it has to have a symbol such as the @ or { to say unbound, the ones below are some often request that i have had or just clan tags that i like.
@@@@, {@@}, {IW}, {<3}, }IW{

tutorial if you want to do it your self or you dont trust me:
1) plug in a usb to your xbox and configure it.
2) move your account to the usb
3) put your usb into the computer
4) use a program such as modio to get the profile on the account on your desktop
5) open it in a hxd editor
6) search your old clantag and click at the very start of where it changes
7) type in the 4 letters of a clan tag that you want, it can not be more or less than 4
8) save it then open it in modio
9) rehash and resighn the profile (do it a few times to be safe)
10) replace it with the old file on the usb
11) plug usb into your xbox
12) sighn into xbox live then go on mw2 and sighn in.

If it comes up with a error delete your profile, then recover it from xbox live, have fun