I posted this article recently. No one commented on it.

I don't agree with the writer where he says multi leaf express sights are a waste of time. He may be correct when he says no one uses the other leaves! It is an ambition of mine to start doing so.

http://forums.nitroexpress.com/showflat.php?Cat=0&Number=364885&an=0&page=0&vc=1

Back to Basics: How to Use Iron Sights On a Rifle

Quality iron sights are simple, lightweight, and surprisingly accurate out to 200 yards

There must be threads on this topic.