Extra Kits
At the in-game cheats menu:

USAS12 Shotgun - aw3somef1rep0wer
Unlock FN2000 - h4h4th3r1snoc0d3
Recon Kit (QBU88) - your3mynextt4rget
Special Ops Kit (UZI) - cov3r1ngthecorn3r
Support Kit (M60) - try4ndrunf0rcov3r