Robust and versatile sight. - OpticsPlanet Exclusive Elcan SpecterDR Dual Role 1-4x32mm Rifle Scope

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, since I shoot with a stock almost fully extended, I have to mount the scope far enough back that the ocular lens cover does not clear all models of rear back-up sight. The tube itself clears easily, so one option is just not to use the ocular cover. A more significant concern, though, is that the position (and thus zero) of the scope is partially maintained by a spring that holds the rear of the tube in place. Thus, you must be sure not to let anything substantial touch the optic while you are shooting, because if you do, it will very likely throw your point of impact off. I have tested this and can get a 6-minute shift with even moderate pressure. Thus, if you assume a very low prone position, say to shoot under something, and don't notice that the brim of your helmet is in contact with the scope, you could be very disappointed with the strike of your rounds. Thankfully I discovered this on the range and am now pretty cognizant of it. I'm sure this spring-suspended system is great for protecting the optical components and that most people will never notice this bug, but it sure was a learning curve for me.