Tried the iron sight but you have to be close enough to see them. It's more like I'm feeling for shots instead of me setting an ambush or making the enemy think twice before advancing. If there is no glint they rush and shot, if there is glint they at least use smoke grenades before advancing. If there was no glint to beging with it would make them weary after the first shot specially when you see your ally drop next to you
Mostly use Pistol for recon so I don't get spotted and I have managed to get some kills but I would like to be able to use a sniper as is intended and not be spotted before I even fire my first shot