Please see attachment.
1. If you want to increase the range of the knife's kill zone, edit the knife_mp weapon file and adjust the minDamageRange and maxDamageRange values. They are currently set to the same kill zone as a pistol weapon. But you might want to increase this range to something like 800:
Code:
maxDamageRange = 800
minDamageRange = 800
2. The knife mod works by having increase damage (it is currently set to 150 making it a one-shot-kill weapon). Because it has no fire sound, and no muzzle flash FX, it shoots players/bots "invisibly". But it is basically working just the same way all other weapons do.
3. The rotating knife flying through the air towards your victims is purely cosmetic. But you should get that every time you "throw" the knife at someone. If you don't, then you aren't threading to the required function properly. To fix that, learn how to code and mod for COD!