I have several break barrels - from a Benjamin Prowler .177 and a Hatsan Edge .25 to a Hatsan Carnivore 135 in .30 using UTG mounts with Weaver and Bushnell scopes that seem to be holding up well.
Mike Holmes
UTG Bug Buster 4x,, 16-17 years old still working fine after ?-6,000ish shots.