Anyone have experience with the multi-MOA Nikon VSD red dot mounted on a swan sleeve for an A3?  I understand they co-witnessan has 1 moa dot.

Funny you should ask.  I just returned from the range today with my Nikon on an A2 with a gooseneck mount from Calvary Arms.  Get the A.R.M.S.#39A2 mount instead. IMO it's worth the extra money. My sights are cowitnessed and I shot a 1" group with the 1 MOA dot and a 1.5" group with the 4 MOA dot.  These groups were 10 shots each at 50 yards.  I'll try 100 yards tomorrow.  Ammo used was Q3131A. Hope this helps you.