The knife takes the place of your frag grenade, so your "throw grenade" button. Default is G I think.
There is no throwing knife in Call of Duty 4: Modern Warfare.
Throwing knifes and probably swiss army knifes. Modern Warfare 3 would just merely call it a Tactical Knife or Throwing Knife.
Press the right stick in
throw it of a building and step on it
You get it by leveling up.Level 13 i think it is :).Throwing Knife: Unlocked at Level 7. Reusable throwing blade. Throw it and pick it back up see related link for List of weapons and attachments in Call of Duty: Modern Warfare 2A related link has also been added for COD Wikia on the Throwing Knife
get a game winning kill with a throwing knife
When you unlock the throwing knife at rank 8 or 10 (cant remember) then you equip it to yourself instead of a grenade and throw it just like one. no matter if you hit them or miss, you can still pick it back up and reuse it.
The name of the knife is called the Tatang Combo Edge Knife. It is made by Blackhawk and here is a link to the knife http://www.copsplus.com/prodnum7216.php
Stab 50 enemies with your knife. You must be prestiged.
well call of duty and modern warfare are the same it is called Call of Duty: Modern warfare and then came call of duty: modern warfare 2
i don't think that they really used a specific kind of knife.
Throw it away and buy a decent game like Mario