On mine I have a Hawke Sidewinder scope. It's the Streamline .25 model.
From the top of the rail to the bottom of the scope tube it's 21mm.
With the large scope it's got a 7mm gap between it and the shroud.
The front of the scope is 64mm.
That leaves a 4mm gap between the bottom of the tube and top of the 10 shot magazine.
Hope that helps.
if I had to guess those aren't medium ring yes no but you could work out the measurements with what has been given
and all medium ring are not the same bottom scope tube height so there could be some trial and error
so what ring are those, it seems you need that height for the mag vs the bell
Ordering the combo Comes with Hawke scope and high rings guess should be fine . Gotta figure out the fill probe and getting it connected to a male quick connect
You need this...
http://www.airgunwarehouseinc.com/py-a-3550.html
I've had great luck with these as well.
I wouldn't go much lower than 20mm on the scope ring height