Asked my smith ..Diana makes a scope mount that fits their small rail it has 2 pins that lock it to the rail nice and tight
This is the one you need. It fits all the Diana RWS break barrels...
http://www.dlairgun.com/Mounts/Leapers/022_UTG_20.1_Compensator_Mount_MNT-DN-034.html
There's a specific one for the Diana under/sidelevers as well. They work flawlessly in my experience.




















































