Cool.
Nope, already checked it. The stock does glide back, but seems a little wobbly. The grip on the other hand seems to be a part of the gun itself and does not move in any direction. It does not look like the other grips I have seen, and it does not fit in the toy's hands properly due to the angle the grip is in. It's almost in a straight angle to the gun itself...
That's the first place I looked.
EDIT: Are there supposed to be multiple sets of hands for these things?