Unfortunately there is no red dot that works well with astigmatism, but this has a crisp enough dot that it's typically still usable. It will also depend on how bad your astigmatism is.
Yes, you can use a magnifier with this sight.
This means it has a "sleep" mode where the sight will power off after certain amount of time, and will automatically power up upon sensing movement, thus negating the need to constantly switch on/off. Grab your weapon and the sight should be ready to go.
It has 6 specific NV brightness levels.
It stands for fixed mount sight. They also have this model in lqd Which is locking quick disconnect.
The OpticsPlanet Exclusive Sightmark Ultra Shot M-Spec FMS Reflex Sight with Integrated Sunshade can withstand the recoil of an AK47.
Yes. The OpticsPlanet Exclusive Sightmark Ultra Shot M-Spec FMS Reflex Sight will work with the Sightmark magnifier as well as any other magnifier on the market today.
Yes. The OpticsPlanet Exclusive Sightmark Ultra Shot M-Spec FMS Reflex Sight is at an absolute co-witness height that will co-witness with AR15 iron sights.
No, this sight would not be able to.
Yes this sight can be used on your 12GA.