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this post was submitted on 17 Feb 2024
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Even in one shot the 3d printed gun will explode. The cartridge is just a container for the gun powder, not the explosion. Real guns have a chamber that contains this explosive pressure.
3d printed guns are nowhere near strong enough to contain this pressure and when the gun fires the bullet is flung harmlessly in some random direction. Since there is almost no energy imparted into the bullet it doesn't have any power or lethality, heck the shrapnel from the casing is literally more deadly for the shooter than any bullet towards the shootee.
Heck a 3d printed gun can even fire a bullet at all. Plastic is not rigid enough to detonate the primer and set the round off. You can literally fry bullets in a cheap metal pot and when they explode they won't even go through the pot.
The only way you could make a 3d printed gun work is by incorporating tons of other metal parts, at which point it isn't a "3d printed gun". Search up pipe shotguns. They can be made with a handful parts from home Depot and only require 1 or 2 tools at home (only 1 if you get them cut at home Depot). Far more effective and actually deadly, even used by guerilla forces against imperial Japan in the Philippines.
embedded spark plug fragments, the ceramic, at least that's what I overheard while minding my own law abiding business having breakfast at Shoney's.
The real difficult part, or so I overheard, is the spring needed to generate the force needed to set off the primer, I did not hear of the other obviously dastardly people who were not related to me in any way by blood or association, apart from sharing the same species you see, had come up with a metal detector evading solution.