UTG have emailed about a natty little adapter for mounting anything to anything so long as there’s some form of rail there (ok so it converts air rifle style mounts to weaver spec):
Airgun/.22 to Weaver/Picatinny Tactical Rail Adaptor
(MNT-PMTOWL)
- Excellent quality and easy to install
- Convert airgun/.22 base to Weaver/Picatinny
- 3.94 inches (100mm) long with
9 slots with grooved rail top to allow for flexible eye relief adjustments- Complete with screws for installation on airgun/.22, including stop pin (UTG)
Oh while I’m on the UTG front there’s an upgrade kit out from them too for their bolt action airsoft gear, specifically the M324 Pre-Gen3 Master Sniper rifles from UTG. Sadly I don’t know what else it’ll fit as of yet in terms of other brands. Their page shows a video demo of the kit and what it contains (link).