Works well, I bought another. The crosshair reticle is mediocre. There are no exchanges, so I bought the delta. Hope it is better.
Mk2 - Non-Tritium Open Sight Rail Mounted
In daylight this sight is very easy to use. I like the low profile and the reflex type technology. The sighting in is a bit finicky - I have a tad bit of trouble getting the hex key into the windage adjustor screw. I don't know if this is just mine or just me. I am able to do it however and it has gotten easier. I would probably buy another one of these and may do so in the future.
Very well made and a unique concept but it is not quite a match for me and what I want for my AR.
Yes you read that right. Best thing I've seen in a long time. Can't wait to put it on my Fenris and compound bow.