The Gun Runners have not taken over selling Energy Weapons after the Van Graffs vacated the Silver Rush. I'm on PC, does anyone know of a fix for this? I'm collecting weapons and mods and am now missing out on some of the unique weapons I think. Any help would be appreciated, thanks!

try Mick and Ralph's because if it can be bought it can be found there, they are located just beyond the East Gate and they've got stuff they aren't even allowed to sell, people!

no, just kidding, despite what the wiki says, to me; after their death; the weapons become unavailable in GR.

you may have to use console commands.