Call Of Duty: Modern Warfare - 14 Tips & Tricks The Game Doesn't Tell You

5. You Can Throw Grenades Through Vents

Another awesome tip from the /modernwarfare Reddit, IamShroundsdad realised that on the Gun Runner map, you can throw grenades and other items directly through the ventilation fans that sit next to some doorways.

This applies to other maps too, but if it's down to the wire and you need to set up a kill-box or play the game in a far more considerate way, try this.