The bits seem like genuine
GW stuff. There are tiny Nurgle Marks all over it. I can identify some of the bits/weapons as an Assault Cannon, Meltaguns, Combi-melta, Flamers, Heavy Flamer, a weird Plasmagun/pistol. Parts of the legs look like Terminator legs.
The models LOOK fantastic. I picked them up myself. But where did they come from?