Features that are unrealistic. IMO
Every one that has fired with a assault rifle or any weapon with iron sights will know what i mean.
When sights are adjusted (maybe 1 time in a year) you don't need to touch them. You just look down your sights and find target, BANG. Hit.
So if you implement some silly buttons that you have to every time you shoot adjust it's just WRONG.
But i don't think BIS would even consider that. So nothing to worry about.
In some situations it would be realistic. According to ex-SAS members who fought in the first Gulf War, you have to adjust the sight on the weapon depending on the person. While one person may hit a target 200 m away, if another one gets the same weapon, he may miss the same target completely. So it would be a nice in case you have to pick up a weapon or something...
i have always wished for adjustable sites in this game. i have my ar-15 site adjusted in a manner that lets me lolly pop my target, i find that easier to use than placing the bead on the target.