Phil, I have a Barska 4-12x40 airgun rated scope I don't use. It was used on a PCP for abour a month, I bought it last summer. It's a mil dot reticle, AO. To be honest with you it is not the most clear scope, especially on higher magnification, but it might suit your needs.
PM me if you're interested, I can send you some pics, it's like brand new with box and papers
Chris