Of all of my guns only one is without it's iron sights. My "Baby Barrett" is a Ruger 10/22 that has been modified to look like a mini .50 sniper rifle. Irons are crucuial unless your just want to hit someone with your stock. EoTechs and Aimpoints are phenomenal optics but there is one event that can render them completely useless. An EMP, or electromagnetic pulse, basically destroys all electronic devices and grids. Your fancy optic stands no chance against an EMP.
Solar flares have been in the news a lot lately because of the giant one that passed over us a few weeks ago. It was the size of Jupiter but was minuscule compared to what the sun is capable of. Many experts believe that a much larger solar flare will hit Earth before the end of 2011. I am not going to go into much detail about EMP's and solar flares because I am assuming that if you are smart enough to be reading this blog than your are smart enough to use Google.
The point I want to make is that everyone needs to make sure their primary firearms have iron sights on them. You also need to be proficient with your irons. I am not saying that we need to shoot up into the sky to try to wound the solar flare in such an event. I am just saying to be ready with the basics. A massive solar flare could keep you without electricity for 4 or more months. Can you imagine how desperate the unprepared will be after 4 months with no electricity? It could get ugly. Defend your family with iron sights. The bullets are just as effective coming from in front of them as they are from the best Aimpoint money can buy.
MORE INFO ON SOLAR FLARES