Starting from the big scary part...the installation.
On an P320 (X5 in my case) installation require removing the sight plate, which also entails opening the back plate and removing the trigger mechanism.
Once they are out the screws holding all together are accessible and with an Alan's key they are out.
Sliding the sight in place from either side, apply some blue lock glue on the new provided screws and with 30 pounds/inch torque there you are work done...don't forget to insert the provided battery.
Overall time 5-10 min, not difficult at all. now that all is in the next part might be the one that takes the longer...down at the range to have fun ;)
To zero it the process varies depending on the needs, luckily all that is required is included in the box, sig provides the tool, a double head screw driver, one side is for the battery cover, the other for the windage and elevation, out of the box should be pretty much there, you can also co-witness the dot with the front sight, there is a small window in the back of the red dot, so if the battery goes during that important match you can still use it.
The dot is really visible, needing a bigger 6" might be cause of vision limitation of the user, but for me is big and bright enough at half intensity, it will double flash when reaches the maximum size, so you know when is that.
