I can confirm that. It also happens to a AH-9 with Ai. The missiles only appear in the pods after you fire the gatling or a missile. And is not airport dependant.

I included and image before firing the gatling and after firing the gatling.

As Someeonee described it dissapear after changing the difficulty. Please close this issue.

After the Game Update 0.52 i can confirm that the issue has been resolved. Please close this issue.

I confirm this. Place any RPG soldier in the sea and shoot it. The soldier sinks but RPG floats

If you start as a opfor diver if you reload to a stanag magazine it never changes but in your inventory those magazine dissapears after reloading.
The only magazine that can be used as an opfor diver is UW.

Theres a report for that for issue also in http://feedback.arma3.com/view.php?id=4451

After the update 0.52 i found this:

Using a rifle:
If you use a rifle to shoot straight to a window:

• First round doesnt causes any damage.
• Second round damages the glass.
• Third round breaks completely the glass window.

If you shoot from a side sometimes the glass is damage and sometimes it breaks completely.

Using a pistol (PO7 or ROOK):
Shooting straight

-First round damages the glass.
-Second round breaks it completely.

If you shoot from a side the glass breaks in the first round.