My Mossberg 590a1 shotgun has a front brass bead sight. I am saving up for a red-dot scope, or I am going to buy another Mossberg with ghost ring sights all because I feel very naked without rifle-type sights on this home-defense firearm. I have never shot trap and this gun has really only one purpose...stopping BG's! What am I missing? I hate my brass bead sight, but they are so popular on shotguns I must be missing something very important. Why the brass bead sight?