If you're low on ammo or want a new gun, trade out.
This gives the game a clearly defined and unique identity within the Co - D series, as well as a fantastic excuse to throw in all sorts of spy gadgets and CIA toys to wreak havoc with. Noticing this escalating problem, Treyarch has decided to give players a quick tutorial on how to minimize lag within 'Black Ops 2' for the PS3 and Xbox 360.