Which Optic For MK III ?

[Hylander]

Trying to decide which would be best for my MK III Competition shooting silhouette to 50yds.
They are all about the same price and all name brands.
Does anyone have experience with any of these?
I do have a bit of astigmatism.

 

[Mobuck]

I have both SIG and Vortex. You're probably going to encounter some flare/blur of the dot with either. My eyes see a vertically elongated 'dot' with both. This doesn't preclude or seriously degrade 'field accuracy' but could be detrimental to 'competition' @ 50 yards. I shoot these optics out to 100 yards with a bit of guesstimation of actual POI.

 

[contender]

I too have an astigmatism. I also shoot several dots.

I prefer the Burris FastFire or an UltraDot.