ok the new glitch has been found
Follow the instructions and boom!!! Thank if u want :3

1. get a frend to invite you to a player match
2. tell him to switch lobby to combat training
3.now you go on a class and hover over any classifide gun but hover over buy
4. tell your friend to back out
5.when yor friend backs out you will get loads of error message just press a
6.when all the messages has gone you will be in combat training just press B
7.then when you do that you will get a crate a class on you screen just make your class with that gun.

heres the video
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