I could reproduce the bug in exe 7679 (the exe recommended for current version of AFS), and on a relatively new exe (about 3 weeks old revision, unfortunately I can't remember the exact revision number, but to my knowledge it was 7786)

I can confirm this, theres at least one sight, for example, Dual Mode Sight (goes from 4x to 1.5x and back), which crash the game when attempting to transform the scope to a different mode