Pretty awesome, but the handle could use better shading on the texture.
You probably should have just used in-game textures all around, actually, because the custom texture doesn't really create anything new; you could easily have made it look almost exactly the same (actually, better, because this time the custom texture doesn't seem to have as much quality as your textures usually do), except it'd have a much lower file size.
Still, it's good, 4/5. I would give it a 5/5, but such a high file size for a sword attachment makes it a bit less useful.