You're asking for a lot of stuff for $400, assuming you want decent quality.
I have a Leupold 2-7 ML/shotgun scope on my Knight. It's been shot maybe 100 times and I've not touched the knobs since I zeroed it. No light, no hashmarks, but solid so far, and well under $400. The reticle is very bold
I probably will have to stretch my budget higher to get what I want. Is there anything with a street price under $500 that meets my criteria?
Your Leupold would be ideal if it had an illuminated reticle.
I have a Burris MTAC 1.5-6x that is very nice. It has a very nice "Ballistic AR" illuminated reticle. But it only has a 3.5" eye relief, and I don't want to set off a magnum charge in a .50 cal. in-line with the scope that close to my eye.
