I have a 835 that I purchased new like 15 plus years ago, it came only with the white bead sight back then. I called Mossberg, and told them I would like to upgrade to fiber optic type sights found on the current 835s, they sent them to me FREE, just put them on, I will head to the range later this week to sight-in, I use this shotgun only for turkey hunting

Well, you sure can't complain about that kind of service. Are these new sights windage adjustable?

I have a 500 with a vent rib barrel. Would these sights work on my gun as well?

They sent me a replacement sight for the front of mine as well. My front fiber optic sight had busted, but the back one was fine. I called them and about 4-5 business days later, I got a replacement front fiber optic sight in the mail, free of charge. Phenomenal customer service.

Bible Man, you can never have enough. LOL

UNcleNorby---I'm not sure who makes them, but if you go to a good sports shop you should be able to find what you want. They go right on the vent rib and tighten just like scope mounts on a rail. As far as I know they are fully adjustable for height and windage. My buddy put a set on his Benelli turkey gun.