Scary
``I actually WON a tactical shotgun match once and found my Hi-Viz front sight on the ground afterward while picking up empy shells. It came off sometime during the match and I did not even notice!``
I was going to reply ``I have a vent rib and a Hiviz, but If I lost the Hiviz I might not even bother to buy a replacement``.
Back to basics-- most HD shootings are 0 to 2 shots at 0 to 20 feet. I maintain that at that distance your need for sights is based on how much money one wants to spend, not on tactical reality.
If you live on a farm or other large property, you might want to look into the other sights, but even then if your perceived risk is more that 40 yards you should move up to a rifle.