For a long period of time, there was no US importer for these things. That problem as now been solved and G&R is proud to stock them. They have also made some improvements to the glass as it appears thicker and clearer to me.
Is there a way to mount these on a TA31F? If not, is someone working on it?
Sure is, Trijicon makes a mount for it (which I have on order). I think I could also get a DD Dr Optic ACOG mount and a JP Ent. under strap to work together as well.