The mounts are fine on a springer if you drill a hole in one and tap it for a grubscrew (get someone else to do it if you aint got the tools) then sit mount over AA or HW recoil stud hole and adjust grubscrew to sit in hole
It the mount wont tighten enough remove around 1mm from the fixed side
My 3-12x44 has been on two springers, one FAC, no problems
If you dont feel confident to do the mods I described buy a set of Sportsmatch off JSR, lets face it the mounts were free anyway IMO especially considering the price of such excellent optics
Baz