Good idea to leave it as is!
A couple little things you could look after; If it has any active cracks in the wood, I'd certainly glue them to keep them from expanding. If any screws are loose or stripped out, take them out, wrap a bit of thread around the threads then screw them back in, to keep them from falling out and getting lost.
If the lock is going to fall out, do something to keep it in place.
One really important thing to remember when saving something for future generations, is that the thing/gun/whatever has to be in nice enough condition to have someone really want to keep it!