https://www.news.com.au/national/crime/ ... 9ef751f931
You would have to be one courageous soul or lack braincells to fire one of these off. Might good for a one shot wonder, 2nd would be a hand grenade. Looks like someones got some mild steel pipe and used it as a barrel.
However, Metal printing technology has evolved so much that they're printing metal barrels is almost affordable. The fire control units, mags are no challenge and designs are easily found and downloaded. But the forged barrels remain a challenge due to the metal density.
This is the future problem and we'll hear more and more of these things popping up. If they become prolific expect all metal printers to be regulated in this country or at least be neutered to not print firearm components. Which is prone to fail cause they can easily be hacked and bypassed.






