Comment on New York's 3D printer law is NOT gun control; it's just.... control.

• FuglyDuck@lemmy.world ⁨13⁩ ⁨hours⁩ ago

  part of the problem with that is that most of your ghost guns are “just” the AR 15 lower receiver- the part classified as the “firearm” because of some technicality only a lawyer can understand.

  It’s not a load bearing, nor is it exposed to any particularly high levels of heat, nor any sort of particularly nasty gasses. So that can be printed in just about anything if the printer’s resolution is good enough. (IIRC, they typically call for resin printers.)

  Then, the ghost gun peeps just buy the rest of the components retail and pay cash.

  for fully-printed firearms, you’re looking at things like DMLS or other kinds of precision metalwork. It’s the kind of work that would be more expensive than roadtripping to arizona and getting loophole-gun.

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  • peopleproblems@lemmy.world ⁨10⁩ ⁨hours⁩ ago

    Couldn’t you just, idk. Use a small diameter steel pipe and the rest of it printed? Maybe im missing a whole crapload of physics for that to be sufficient

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    • Bluewing@lemmy.world ⁨4⁩ ⁨hours⁩ ago

      Chamber pressures for the 5.56 Nato is 58,000psi. And 9mm is 35,000psi. It takes a pretty good piece of pipe to contain those pressures. Your average seam welded pipe is around 4000 to maybe 10,000 psi.

      Zip guns made from hardware store pipe are just barely good enough to contain a low pressure 12ga bird shot shell.

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• dual_sport_dork@lemmy.world ⁨15⁩ ⁨hours⁩ ago

  It should be totally possible to whittle a functional AR-15 lower. Especially if you wanted to mate it to one of those fancy new bufferless uppers, so you wouldn’t even have to worry about the stock and buffer tube.

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  • in_my_honest_opinion@piefed.social ⁨14⁩ ⁨hours⁩ ago

    The bufferless part is a bit of a sticky widget as the back of the reciever usually stops the rearward travel of the BCG. So actually buffer tubes being made from steel and allowing for slower deceleration of the BCG make for a better candidate for “softer” lowers.

    If there is buffer less upper that doesn’t use the lower receiver as the backstop for the BCG please let me know. I stopped following shotshow a decade ago.

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    • dual_sport_dork@lemmy.world ⁨14⁩ ⁨hours⁩ ago

      I’m not 100% certain. Possibly the Brownell’s BRN-180, although I haven’t handled one personally to see if the endstop block it comes with relies on the rigidity of the buffer tube ring to stop the bolt carrier or if it attaches to the rest of the upper itself in some way. The recoil springs are entirely captive and attached to it, at least.

      I suppose you could also just reinforce the shit out of that area in your design if you knew you didn’t need to have a big hole through it.

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      • in_my_honest_opinion@piefed.social ⁨13⁩ ⁨hours⁩ ago

        BRN-10, Jackyl, CMMG Dissent all rely on a buffer tube ring and will crack the back of a printed AR lower.

        https://hoffmantactical.com/designs/sl-15/

        This will happily cycle an AR 10 upper with a buffer tube.

        You have a good idea about reinforcement. Screw the endstop block into a blind hole in the back and have a monolithic lower with stock. Like a short stroke WWSD rifle.

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