Before buying a reflex sight, every shooter should know what performance he or she expects for the given price. There are countless suppliers with an unmanageable number of models and features, so you should always think about what the sight should be able to do before buying. In general, it is always advisable to look at prices, equipment and (if possible) place of manufacture. Visier magazine writes the following:
„Models manufactured in Germany or in the USA already have a higher production cost. Japanese manufacturers, on the other hand, are professionals when it comes to the quality of optical lenses and electronics, and deliver both at comparatively lower costs.“
When making a purchase decision, the point size, point sharpness and point color should be important factors: point reticle only or switchable to circle/circle dot ? Do you prefer green reticle color or gold due to the weakness in red-green vision? You should ask yourself these questions beforehand. Most manufacturers indicate the size of their luminous dots in MOA (minute of angle, about 2,8 cm at 100 meters or 1 inch at 100 yards). For long guns and shooting distances of up to 150 meters, point sizes of <3 MOA are recommended, for short weapons <4MOA.
It is also advisable to know the conditions in which you will operate, whether in extreme conditions, or with gloves; at the indoor range or in the wild. Do I need long battery life? Or transparent protective caps through which I can aim immediately even without opening them? As already described above, closed models or container constructions are suitable for extreme conditions. Models with solar cells and/or shake-awake function (automatic switch-on/switch-off) can save batteries and simple control buttons make use with gloves much easier.
Another important question: is there a suitable assembly for my weapon? Before buying an optoelectronic sight, it should be clarified whether the manufacturer can supply a mount that corresponds to the weapon and its requirements, or whether a special format is required from the gunsmith.
Determining the eye relief is only limited, if at all, by the mounting options on the weapon. When buying, always make sure that your new reflex sight restricts the field of view as little as possible, without neglecting lens protection. Depending on the application, open reflex sights with 24x32 mm lenses or tube reflex sights with a diameter of 20-30 mm are useful.