My first thought is also DD.
What about Conetrol mounts?
As I stated in my OP, the DD's hang over the loading/ejection port. Conetrols do the same. Go back and read the op. I know you like your fancy rifles, but to me, there's elegance in simplicity and function. Some guys will pay top dollar for conetrols and S&K and then post pics of them on their $4000.00 rifle and when it hangs out into the ejection port, it looks like dog chit to me. Sometimes the engineers get those rings and bases right and they are beautiful, sometimes not so much.