I've had this scope for about 8 months now, and it performs just like the optic on my duty rifle. The 1x/4x switch is quick and easy to use, though it is possible to accidentally flip it if the lever catches on part of your gear. I've only had this happen once, but that was enough that I now check the position of the lever each time I sling or unsling a rifle as well as any time I've had to take my hands off to do medical, breach, etc. I have not noticed any shift in point of impact between the two magnification levels on a 2-minute rifle, but I have also never shot for groups past 100 meters on the 1x setting and don't anticipate a situation where I would. For offhand shooting any shift there might be is a non-issue compared to human error.
Optic holds zero well: I go to the bench to check zero about once a month and I've never had to adjust more than a minute unless ammo or environment were significantly different; usually I don't have to adjust at all. The BDC is close for most 62-64 grain ammo from 14-16" barrels, but the elevation is also accessible and repeatable enough that you can dial to use the center of the reticle at longer distances if you have the time.
As for the back-up irons on top of the scope, they work as expected, but if I were ever to have the optic fail I would get the thing off at the first opportunity and use a more conventional backup.
There are only two things that I don't like about this scope. The first has to do with the flip-open covers, sinc...
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