Thanks for that Stoker.
See now, what (also) worries me is that the A2 is equipped with SUSAT.
What this means to me is that (correct me if I'm wrong please...I'm sure you will) soldiers arn't trained for iron sights anymore. This has a very specific technique and is invaluable to all soldiers...I believe.
Imagine your weapon goes dry, or malfunctions in a FIBUA contact. You haven't got time to get our your tool kit, sit down and strip your weapon or you have no more ammo. Considering all the enemy are using 7x62 your weapon is incompatible. You pick up an AK47 or G3A3, both used extensively in the Middle East (obviously), and guess what? You're having a little difficulty in lining up the sights.
In addition, if you drop your weapon and break the SUSAT you've got to clear the room as they use tritium (I think that what it is) to help with low light amplification. This stuff is nasty, do not inhale!!
If the A2 is effective to 500 metres...well...the G3 is effective to 400 with iron sights!! And you don't have to worry about dropping it, getting it wet or sandy.
You get my point.
Either way, the best person to be speaking to regarding this matter is RMRO who's probably been on operations with it.