There be a number of cheaper red dot/optical sights out there that use regular ring mounts.

For example....

http://www.millettsights.com/scopes/sp-series-red-dot/

https://www.midwayusa.com/product/1397459296

I am..........disturbed.

Concerning the difference between man and the jackass: some observers hold that there isn't any. But this wrongs the jackass. -Twain