How about throw the knife, hit with your guns?

I have a very great idea. Z8 games let's let us throw the knife just like COD.
I know the Chinese, vietnamese, Korean version doesn't let you throw the knife.
But it would me really cool! I think after you throw that knife, since you don't have any weapons, so let us punch for 20 hp each. That would be fun! xD
And yea , let us hit with the gun also xD