UPDATE!
Got my guns back!
Most were in good shape. new stock dings, lost accesories; I got really lucky in the main.
The pricks did try and I mean they *tried* to chop the barrel on my 520. I suspect it is totally unsalvageable. I can't imagine any welding job could fix the massive gouge they put in it just south of the 17" mark. However, my research indicates that a gun smith could verify the fit and safety of a new barrel from another 520. Decent.
For reasons I can only ascribe to the influence of crystal meth and inadequate parenting, these cretins couldn't master the mysteries of the M14 buttstock trap and tried to *pry it open with a flat-tip screwdriver or chisel*. So I need to find a new butt trap lid, because they snapped that off. But otherwise, all seems good.
The evidence people were still telling me they couldn't prosecute without the actual guns, but the cops and everyone else say that's crazy.
So thanks for all your support. Next step is rehabilitating the damaged guns and getting in with a local club.
Again; thank you all for everything.