I thought Hawke's Airmax line is the one that will hold up to a spring air rifle. They run about double the cost of the one in your link.
As far as I know everything Hawke sell is airgun rated. The whole "Airmax" designation has more to do with the M.A.P. airgun trajctory drop reticles Nick Jenkison designed for them than anything else.
Even if it is not Airgun rated , it is a MOOT point. The OP asked for a good rimfire scope and the Hawke HD 3-9 AO is equal to anything out there for rimfire use at it's price point.
They are excellent scopes.