One little comment. The small screw that Dave mentions is usually difficult or impossible to remove; especially if the previous owner did not remove it often. I have a .54 Hawken that the screw will not come out although the rifle is imaculate for clean. I talked with T/C about sending it in to have the screw replaced and they said they do not recommend removing the screw and on newer rifles they do not even make it removable. It is actually the machining access hole that they just thread and plug. I think on some newer rifles they plug it with a solid plug that does not have access for removal. If you can get it out (it usually has a slot for screwdriver) it should be replaced with a screw that has better tool access like a hex head set screw, just check to make sure the one you are using is either high quality or stainless and the correct thread.