I used to play Combat Arms but I uninstalled it for O7. If you can try to get back to O7 or Cross Fire.

The reason behind not choosing is CA is...
1. A lot of the players think they are very good and if you kill them you are instantly called a hacker.
2. Hackers... -.- Not many though.
3. Very unbalanced. The shotgun probably is the worst gun ever introduced into this game. Reasons? First...head shot and nut shots are one hit kill. Shotguns are insanely powerful at close range and...the spray from the SG almost (90%) hits either the nuts or the heads. Make a female char for no nuts. Its still way overpowered.

Whats crazy is that all the higher level players use the SG so they have no skill at all. Point and get kills.