I don't like the sway you get when ADSing because the sights are so damn obstructive, with an RDS that becomes a nonissue. But, RF is really really really good too though.
I run w/o sights... It's a wasted slot IMO. The irons are just fine. If you're camping, simply aim just below your horizon to see above the sights. This will keep those fat wings on the side from obstructing your view.
================== Primary Gunfighter
1.) Silencer 2.) Rapid Fire 3.) Quickdraw Handle ==================
Silencer keeps me off the map and reduces kick & muzzle flash. Rapid fire is great when in CQC. Quickdraw for obvious reasons...