Animating a butterfly knife flipping (Stock Knife)

[Seph]

So I'm struggling here. Again. I'm trying to animate the spy doing a knife flip for this scene, but there are complications. First I realized that the c_knife model doesnt have the correct bones to be animated flipping, so I tried v_knife only to find that it has a whole damn spy arm that comes with it, very well, I hid the spy arm in the shot but now I have a new problem, when I locked the knife part of the model with my spy model, the rig on my spy's arm screws up (using rig_bipod_simple) and now when I try to move the spy's hand this happens:

http://imgur.com/a/DabQ2

Is there an easier wayt around this? or do I have to animate and sync them separately?

[TruBlu0014]

Try locking the knife to the spy model BEFORE applying the rig. I once tried locking an object to a model I had rigged and then unrigged it. Something similar happened to you.