I know this has been said before, but I recently did a test with some weapons and got the folowing: 
Moisten Nagant = 45   M4 = 22   |   SMG = 10   MP5 = 6   |   FAMAS = 10   M14 = 
##   AK47 = 
## The number is how much damage they deal to another player at close range (when shot in the balls). I preformed this test when I dealt full damage so these are correct. 
My point is this: The MP5 fires slower than the SMG, deals less damage, and has 5 less ammo per clip. It is a useless weapon is is completely inferior to the SMG. I suggest that the MP5 either buffed or be removed.  (Yes, I know I misspelled the M4's clone) 
-SNIP-
I need to post the rest of what I had in this thead in another section. 
EDIT: It's now here: 
http://forum.randomgs.com/index.php/topic,13204.0.html