-------------------------------------------------------------- i think that what you say is correct , The problem will be overcome in my opinion .I have been using 3D printers for a few years now to do my prototypes. I can cast 3D printed parts using lost wax or lost PLA. They rock, but they are the worst way in the world to make a gun.
A 3D printed gun is basically a hand-removal-tool. It will blow up on you, guaranteed.
They don't go through metal detectors because ... firing pins, springs, and bullets must be made with metal cases primers and projectiles.
The Luty is easier to to make, is based on a proven design, the German MP40, and can be made faster (and the plans, templates, and parts lists are all on the Internet).
Not going to get through metal detectors but it will solve the melting issue regular (plastic) filament has: New filament means you can print metal on any 3D printer
I've been using metal infused PLA on my printers for years now. It looks like metal but is no structurally stronger than plastic. Remember, to work in an FDM printer, the material has to melt at around 200C. The heat of expanding gasses from a fired cartridge is around the same temp. Combined with the pressure of the expanding gas, structurally weakening the material with each shot.
This is just media hype to get us all to fear gunz.
IDK when we were just down visiting our son he had metal filament that was really close to metal strength; he had printed out some knives and they seemed very viable as weapons to me. (I'd have to ask him if he ever got them sharpened/if they held an edge, they were blunt when we saw/played with them - we were playing lawn darts with the metal filament tips too - sand though so not much of a test on that.)
I've made knives out of plastic, metal, and wood ... any one of which can have a deadly edge. Ever get a paper cut? The thing is, the weaker materials don't hold an edge as long.
That's the problem with plastic guns. They will not maintain their integrity after repeatedly being exposed to the heat and pressure of modern ammo.
If you want to 3D print metal ... there is an older, much more established, technology that will take your design from computer to finished product totally by machine. It's called CNC and it's been in industrial use since the '60s. Instead of building up layers of plastic to create an item, CNC will remove layers of almost any material to create an item.
Software-wise, the technology is virtually identical., but the machines needed to work with materials like steel are prohibitively expensive for the home user.
yeah but CNC is cost prohibitive. 3D Printers are affordable for almost anyone, which means that regulation of guns will be nigh impossible. Frankly it's only a matter of time before gun manufacturing is done at home - it'll be a hobby most likely; like beer makers today.