Someone should dig into who this is coming from and why. The answers are usually either (a) they got paid to do it by a company selling the tech, which appears not to be the case here, or (b) they went insane on social media.
(can't confirm this personally, but it seems from other comments that it's perfectly feasible to just drive out of New York State and buy a gun somewhere else in the gun-owning US? And this is quite likely where all the guns used in existing NY crime come from?)
I would also note that the Shinzo Abe doohickey wasn't 3D-printed.
People are printing guns. They're printing guns right here in the UK.
Then they're taking them out to the firing range, setting them up on a test stand, firing them by remote control, and filming the ensuing carnage with high frame rate cameras.
If you make a really really good 3D printed gun, it'll last at least two shots before it explodes into about a trillion razor-sharp fragments expanding rapidly outwards from where your hand used to be. The way you tell it's a really really good one is it didn't explode into a trillion fragments on the first shot.
We've seen enough Terrifying Public Information Films about the dangers of fireworks to mess with that shit.