Is legal, and available to gun enthusiasts.
And you can totally build bombs out of it.
I’ve seen fire and I’ve seen rain, I’ve seen mailboxes exploded by deranged. People the weephole at the bottom of a window, a vinyl window…
PVC.
Polyvinyl chloride..
Stuff a bit of tannerite up there,, get it in all the cracks..
Blow that fucker to kingdom come 😂
You would want a rudimentary understanding of dry contacts, normally closed, normally open, stuff like that..