I finally got my 581-series set up the way I wanted, and I'm pretty pleased. Even though I have the rifle mostly disassembled at the moment, I briefly had it with the Warne Quick-Detach 30mm rings supporting an Ultra-Dot MatchDot sight. This will be a pretty good setup when I get it back together in a few weeks. The Ultra-Dot is a solid performer, and the ability to quickly detach the sight/rings as a single unit will provide the shooter with the ability to use iron sights (in this case, the Mo-Reaper) as an option. I'll get some photos together after my daughter's wedding is over and after I get my trigger assembly back from MasterPsmith...