Airgun scope? In Europe, some top tier shooters do use them on airguns, but I've not met anyone in Canada who shoots en expensive enough airgun to justify putting an optic like this on. In Europe, they are much more common.
The Stryker 5-50 seems to work nice on my F-Class gun and I know that they are being used by at least one F-Class shooter who is in the top 5 in Canada. Both he and I were using Nightforce prior.
When you reach that level of competition, you want the best equipment you can afford. That should speak volumes.
Sorry, no offence intended, but I was quoting the product description provided on Hirsch Precision's website;
"This is one of the very few good quality riflescopes for airguns with a reticle in the first focal plane. The unique reticle called HFT was designed and tested by JarosA,aw „Yaro” Matuszewski. It is fully dimensioned and is perfect for measuring the distance. 3-year warranty."