To be honest, you could have made it NOT look like it is just some forgeted up version of wolverine. Last time I checked, assassins don't gorilla-glue sonic the hedgehog spikes to their palms as a means of self-defense.
I recommend remodeling it, you could attach it to where it really belongs, near the wrist.
I realize the fact that Avatars don't have wrists, but you might as well make it look like you tried, and not just put a stick on your hand and called it a killing machine.
It could definitely use more detail, as opposed to the random mutated metal thorn being extruded quite gruesomely through your epidermis. Try making some kind of Contraption model that would look like it could contain the blade, and then have the equipping animation pull it out.
I don't mean to flame my testicles up my esophagus, but I'm just saying that I definitely see more potential to this than some random polygon stuck onto a couple more polygons instantly killing everything it touches.