Have a 3-9 40mm AO red/green illuminated on a .22 SA from h t t p://dlairgun.com/scopes.htm (33% less than Frontier) as I wanted to see if I liked some of the features - i.e. would I be willing to pay for them in an expensive scope - mildot reticle, illuminated reticle, locking & resetting turrets... would buy another for a .22, am quite happy with how it works.