Just took delivery of a new RDB Survival which has fewer places you can mount things. I don't have any experience in using a Picatinny rail and not sure what makes sense with this Survival version. I expect to use it for home defense so I'm guessing a light would be good and maybe a red dot (though something reasonable in price but will still maintain settings after firing a few rounds) or maybe just stay with the iron sights. It came with a sling strap, but without buckles! What's up with that? Any recommendations on a better sling that will fit through the 1" slots n the stock would be appreciated.