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.
Here are some pics of the little guy.
C4
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.
C4
Grant,
How much are you selling them for?
They are $398, but am sure I can offer M4C members a discount on them! 
C4