IK is another way of animating; instead of moving each bone sequentially (upper arm>forearm>wrist), you move a pre-defined controller which moves the base bone (wrist>forearm>upper arm). This allows linking of the controller to a set object, which can be sued to keep the hand's position relative to the gun the same during animation. Leet released an IK setup for the FP arms a while ago. (I made a rig for it too, but it was replaced by one extracted using the gbxmodel importer ) http://gbxforums.gearboxsoftware.com...ad.php?t=57987