I have a bead site on my 870 Tactical and I want to add a nightsite. The gun is primarily for HD, but I also take it to Alaska for brown bear defense and sometimes carry it on my back while fishing there. The 870's receiver is drilled on top (factory) with 4 small screws. I was thinking of a rifle site that I could mount off those screws somehow, then adding the front site that attaches to the bead. Any ideas for a good sturdy set-up that can be banged around some and stay strong? What type of mount do I need to hold a rear site? I'm not looking for a ghost ring. Thanks guys Wanna kill these ads? We can help!