Having break barrel rifles with scopes (Beeman Crow Mag.20,RWS34.177) has been no problem for me.
As long as the scope is designed to handle the recoil in two directions of gas-rams/spring rifles as well as the recoil level of said rifle.
Bushnell Trophy 4-12X40 AO
Hawke 3-9X40 AO
Bushnell 4x AO on an RWS 52
The AO kills the fuzzy at close range.