Guards only spawn with items sometimes

I think the only ‘list’ I’ve seen is when you try to equip them in creative mode compared to UEFN. I haven’t done it in a while though. I know the og pump shotgun works, the og sub machine gun, the og assault rifle, and the standard pistol. Most other weapons I’m not sure about but most do not work. A list would be great but I’m not aware of any.