“homemade bomb”
Where do you buy the factory-made ones?
“Where do you buy the factory-made ones?”
Acme.
Seriously, there are commercial explosives and devices for sale, if you have the right license.
South of the Border off I95 in the Carolinas IIRC.
Couldn’t resist. It used to be a fireworks supermarket and amusement park. Roadside America..it was great. Probably gone now.