The authoritarian enthusiasts at youtube are probably shitting them selves over this one. Using 3D printing to make shape charges and ranged rocket weapons. Instead of a pimped out light saber it's a homemade rpg2 or PanzerFaust reproduction. 3dprinting 3dprint
If you watch the first minute of the first U-Tube you will notice the Disclaimer that these folks that made the video are licensed by BATFE, and have an Approved STORAGE Magazine.. The rest is not restricted information, and is legal to research and discuss under the 1st Amendment Constitutional Protections. Tannerite, as a Binary Energetic is legal to posses in small quantities, when unmixed, and legal to mix, and posses, in small quantities. when used immediately upon mixing.. as BATFE has stated their Regulations.
Shaped charges can be improvised by using a variety of benign everyday objects. No 3D printer technology required...one could even paint the shaped charge a scary black if one wished...though painting it a woke rainbow colour is probably like to attract very much less attention...of course YMMV, and know the applicable regulations of your jurisdiction.
To hell with the system, it's broken. A little more explosives won't do any more damage. Linking a video from YouTube doesn't break the CoC here as YouTube has very strict rules in place already. It's like this place runs itself sometimes.
What 3d printing does is allows you to make the thing out of 90% copper filler, make it any shape, thickness with a $100 3dprinter. The company's that make the copper cones buy large sheets of copper, then stamp and punch out the parts. Every time they want a different thickness they have to buy a different sheet or or make a different stamp when they want to alter any dimention. That's a lot stuff to make or change one little part.