Weatherby makes the SA-08 youth 20ga. It has a 12 1/2" LOP and 24" barrel. The full size stock is a mere $55 from Weatherby.
It is the shortest LOP currently offered. Buy it, clean and go shoot 2 boxes of heavy 3" duck loads thru it, clean it again and let he have it. She will never be able to wear it out and will most likely never have an issue with it either.
It comes with a light and heavy piston that takes a few minutes to swap out, just make sure you are using the heavy piston during break in.
