you might find the 3.5moa sts a little small for an open gun
Possibly, but the 7 MOA was $30 more and i'm not really competing with it so I don't think it will be a huge issue for me. I've rested it atop my 34 at "shooting" distance and it looks OK to my eye.
I may take the second one and mount it on my rifle if I don't mount it on my pistol. It would be great on a stock Ruger 10/22 for plate shooting.