Get some added accessories by traveling to the the Multiplayer Main card and selecting the Enter Code option. Then ascribe the afterward codes after the quotes to get the agnate kit.
Unlock QBU88 Recon Kit (Sniper Rifle):
Enter the code your3mynextt4rget.
Unlock the M60 Support Kit (Machine Gun):
Enter the code try4ndrunf0rcov3r.
Unlock the Uzi Special Ops Kit (Machine Gun:
Enter the code cov3r1ngthecorn3r.