Just noticed that is you do a quick mission and its air start with no target selected, your Fokker Dxxi (either version) will have iron sights (sight tube), yet if you select a target or scramble mission your aircraft will have a reflector sight instead.
From the 4.09 Guide:
Quote:
Note: Gun sights randomization
Both Goertz tube sight and Revi 3a were used in Finnish Series 3 Fokkers. About 40% of all planes had
Revi. Therefore a virtual pilot in game has a 40% chance to get Revi when default skin is selected. With user skins (BMP) the sight is Goertz by default but can be certain skins can be bind to Revi with Customization.ini file in skin folder.