Please tell us a bit more about the knives and their features in the long description.
The LICENSE.md link in your description is broken.
I do not know how I feel about the textures... they are default's swords with the tip cut off, shouldn't that be credited?
(A suggestion: you can use [lowpart:P:filename and cut off default's textures instead of copying them over, since you depend on default anyways... I think I'll do PR)