Modern Warfare 2 - Tips Tricks and Tactics

In olden times there was no such thing as bullet penetration. For example Far cry: instincts  there was no bullet penetration, you shoot at a thin metal sheet and bullets just bounce of. Why am I bringing this up you may ask. Because you should use it! If you see an enemy behind a wall, you could shoot through it and kill him. When someone you are chasing runs behind a wall, don't go and chase after him let your bullets chase him and shoot through the wall. They are a lot faster than you! But be careful though are there are times when and when not to do this, For example if you start spraying the hell out of a wall all the other team will see your red dot on the mini-map and proceed to own you. Take this into account and you could get a few more kills!