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You can now buy a flame-throwing robot dog for under $10,000
(arstechnica.com)
This is a most excellent place for technology news and articles.
Considered firearms.
No they're not. The ATF does not consider flamethrower a firearm and there exists no country wide law about flamethrower, and by law, even a felon can own a fully working flamethrower.
Right. I'm saying that you wanted to use the term "firearm", not "weapon".