So after much hand wringing, I ordered an RMR type 2 RM06 and a Holo 508T. The RMR was $449 at EuroOptic and the 508T $369 at Midway. We'll see which one I like more.
I also have a first Gen 509T unopened in a box, that I wanted to mount on an Agency Arms AOS system that I was going to send my slides for, but I decided to just go with standard RMR milling done locally for my Gen5 G19 and G17 slides.
So..I'll try to mount the 509T on my Ruger mark IV 22/45, or as an offset on an AR using an Arisaka mount.
What kind of picatinny rail adapter do y'all suggest to get my 509 T onto my Ruger 22/45?