I have long been an iron sight guy. I always want irons as back up. the sub2k and mcarbo optic mount dorve ne to make a bold choice.
The optic mount is one great piece of kit . In my humble opinion the only viable solution for quick deployment of optic on sub2k.
I have been one of the unfortunate to have my irons canted to the left with my holosun HS403B
I have tried the shims and that was a less than stellar outcome. I also wanted to have 1/3 rd cowitnes option which I was never able to find.
Finally I just realized that the sight picture was to cluttered for .my eyes.
In a final attempt to get the best solution I removed the front and rear sight.
Now, I have a very clear field of view that is quick to acquire targets and get off accurate snap shots.
I am still a bit nervous about not having back up irons but I think with training decent shots out to 50 yards should be easily attainable.
I am much happier with this configuration.