Is your question about legally acquiring an AK-47?
Because jihadists don’t pay attention to gun laws.
France has strict gun control laws and the jihadists there were using full-auto AK’s that are not even legal in the US.
I’m pretty sure explosives are illegal as well.
I don’t mean for organized terrorists owning such weapons. I mean like the alleged “lone wolf” suspect to one (or more as has been reported).