I wouldnt bet my life on any red dot or scope being there in 100 % operation all the time, so much so that i neglect using my irons.
I like irons. I dont even have red dots or scopes yet on any of my battle rifles (7.62x39 converted saiga, sks, fal, 223 saiga converted). I do have a kvar mount, and will be buying a kalinka mount and an aimpoint.
Red dots and scopes are great, but they are shall we say a nice accessory, not a crutch to lean on. It might not always be there. I think i could abuse the hell out of an aimpoint, and it will hold up. But i would not bet my life on it.