use this class,
famas or aug-with extended mags
any secondary they are all useless.
hardline pro-1 less kill to your killstreak
slight of hand pro-faster reloading
hacker pro- see enemy claymores
Now play Demolition, go to the enemy spawn points and camp, but don't say in one spot the other team will start to come after you.
oh and lure the enemy near you by "ringing the dinner bell"... shoot(it will show up on the enemy radar) now hide and wait for the dumb asses to come to you.
now if this does not help, buy a different game.(like crysis2, killzone3,homefront.)
im savin' the world, 1 game at a time