This may be blasphemy, but here goes
View attachment 33225
.
If you
must use iron sights, the SOCOM is probably a better bet for you.
The RFB's main claim to fame is the same firepower in a much shorter package.
If you are using a scope 3" away from your eye on either one, there is simply no need for the gun to be 5 feet long anymore.
I don't think even the Hunter variant RFB with a quadrail will be able to get the front sight far enough away from you to be effective.
The closer the front sight blade is to your eye, the larger it becomes in relation to a bullseye at 100 yards and therefore, less accurate.