I've been struggling with the Swiss Arms optics question for awhile too. As I was showing in the other recent thread on this topic, I had a 3x Acog Compact with with the red crosshairs on my 14.3" carbine, which is just a smokin' awesome combat gunsight, but it just wasn't really the optimum match for a Swiss.
Now the 3x ACOG Compact has gone over to an M4-type carbine (should have pics by the weekend), and I have gone back to the drawing board on the Swiss. I was seriously looking at the Aimpoint Micro for awhile, but the 4 MOA dot is a big concern for me. I have not tried it, but it just really seems like it would be "blobular" for the kind of shooting I like to do with the Swiss (beaning an orange clay at 100 yards, etc.). Crosshairs are nice, or some kind of really fine dot or chevron.
I think I will experiment with swapping an EOTech (1 MOA dot) from my 9mm AR onto my Swiss for awhile to see what that is like. Still, the Swiss is accurate at some considerable distance - would be nice to have some magnification. One of the ROs at my range uses the EOTech (the one with three 1 MOA dots) and a magnifier - but that is a lot of "clunk" on what is already a heavy gun. Same goes for an Aimpoint with a magnifier.
Optics for a Swiss are a bit of a conundrum. First a guy has to decide.. what have I got here? A close quarters guns, a mid-range, a 200 to 300 yard gun? I'm not sure I've even resolved that question in my mind yet... so back to the irons it is.
As a bit of a different take on this... I've recently found that I have no problem beaning the little 230 yard gong at PoCo with my $600 VZ58, bone stock, with the irons. Sometimes just focusing on shooting is probably more productive than focusing on gear. I lose sight of that sometimes.
Having said that, if I could find a low mounted optic in the 4-6x range that was a great mate for the Swiss, that would make me happy.
By the way, what does the actual Swiss Army do? Do they just have everyone shoot irons - unless you are a designated marksman or spec ops? And what do the marksmen and the spec ops use?