>>358498197
Remember that attachments can lower your kill reward to 0.
>supp_pistol -50
>supp_rifle -200!
>grip_angled -100
>grip_vertical -150
>acog -50
>holo -150
>reddot -150
So an m4 with 300 kill bonus is reduced to 0 with a red dot and vert grip. If you spend all of your money and lose the round you'll end up broke doing this.
Famas is another gun to avoid if your eco is hurting as it has 0 kill bonus. Teamkills and suicides also reduce your money but otherwise you should always be able to afford full armor and a 5-7.

Rifles are dominating hard at the moment and I'm finding it harder to justify SMGs beyond a barebones UMP (which has the highest killbonus of any gun at 700) when we need to make a comeback.