On the Steyr AUG A1 we have an optical sight that magnifies 1.5x I believe. Its a pretty shit sight but better then nothing. We're confident to 300m with it and we generally say if we're firing as a section, we'd hit past 600m. Before anyone comments on our accuracy, I'm a reservist, and a medic to boot
. When the situation calls for my marksmanship to be exemplary, we're in the shit!:L
We have an Emergency Battle Sight on top of the optical one in case it gets smashed. The iron sights are abit high up though and awkward to use, if you hit to 200m with them, you're doing good. I was personally happy with 150m!