I am getting a Mossberg 500 for Christmas that I intent to use for home defense & SHTF situations. The sight on this model is a gold bead up front, and the top of the receiver is flattened, and the top of the receiver is drilled & tapped. What I'd like to know is: if you have a HD shotgun, what sights do you have on it? Pictures would be helpful, if you have them. I've been looking at red dot sights, but I don't like the idea of that being my only sight, and if the battery dies or it breaks, I'm out of luck.