Cutout periscopes are possible for driver maybe and for commnader/gunner screens only. Most of 7 commander periscopes are facing interior, coutout would be weird looking.

Thanks for report, changed to 500 rounds/min.

Thanks for report, PiP problem:
https://feedback.bistudio.com/T159324#2206831

Thanks for report. Periscope problem:
https://feedback.bistudio.com/T159324#2206831

https://feedback.bistudio.com/T159324#2206831

https://feedback.bistudio.com/T159324#2206831

Thanks for report.
It is a optimalization issue. There is no ideal solution for periscopes in ARMA 3. Modeled cut out are not possible in some geometry. PiP is very demanding according to PC performance especially when multiple render targets used.
Therefor we are using one render target for LAV driver, which need partly overlap for better quality. In LAV turret is one render target for primary periscope (gunner and commander screen) and for eight secondary periscopes is used fake enviromap.
We are open to any solution for better ingame experience and optimalization.

Thanks for report, can you please provide link or source of ammo swap duration?

Thanks, fixed

According to zeroing manual it should be 300-800m zeroing, 100m increments, there is a mark on left side of sight.
"8/3" means 800m and 300m. When the elevation knob is very close or flush with the bottom (full counter-clockwise) , the elevation is set for 300 meters or closer. If you rotate the elevation knob one full revolution (360 degrees) clockwise and the "8/3" mark shows again the elevation is set for 800m.

How works rear sight:
The rear sight has two apertures for range. One aperture is marked 0-2 for short range from 0-200 meters and an unmarked aperture for normal range from 300 to 800 meters.

as intended
https://helidat.cz/photos/15142168710.jpg