I believe (could be wrong) airgun rated means spring piston airguns as PCP airguns have essentially no recoil. When shopping look for a lifetime warranty by a reputable manufacturer or source. Choose a scope with an adjustable objective or side focus (your choice). Scopes with etched glass reticles tend to hold up better than those with wire reticles. Save your receipt. Leapers UTG as well as Hawke put out airgun rated scopes though airgun rated scopes are not necessarily for magnum springers. There may be power limitations the scope is rated to handle. I have some Sun scopes. They do not claim to be airgun rated but they do have a lifetime guarantee and one of their vice presidents told me if I break it they'll fix it or replace it under their lifetime warranty. Bushnell and Center Point scopes are popular but I've not used them. In any case you should check with the company or read the literature carefully. I have a Hawke Sport which is not airgun rated but one of the guys at Hawke told me it should be fine on anything short of a magnum airgun (whatever that is) and if it fails it has a lifetime warranty. It's never failed. Scope shopping can be kind of a crapshoot. You get what your get. It will hold up or not. Magnum is a moving target. What was magnum ten years ago is run of the mill today. And I didn't even mention mounts. How a scope is mounted can affect longevity, too.