It's a real knife I have right in front of me... I will definitely change the orange, and make the blade more metallic. Those plans were in the works already. Thanks for the comments.
If I was you, I would put the serrated section on the back of the knife. It makes it more effective as it will almost double the damage as it is withdrawn. (I'm mean a real knife, not the model. I know the model has no bearing on the damage in game) Plus it would look a bit meatier.
In a similar vain, I would widen the tip a bit. Again, it would case more damage on the way out if it were a real knife, so will look better in game, imho.