Standard PLA plastic will shatter under the pressure of a live round. Most hobbyists use PLA+ or Nylon , but even then, catastrophic failure (the gun exploding in your hand) is a real risk if the print settings aren't perfect.
You generally won’t find 3D-printed guns for sale in a traditional store or online marketplace like eBay or Amazon. buy 3d printed gun
Under recent ATF rules, "frames and receivers" (the part of the gun that makes it a legal firearm) must be serialized if they are sold or distributed by a licensed dealer. Standard PLA plastic will shatter under the pressure
Sites like DEFCAD or Odysee host the blueprints. Note that the State Department has previously fought to keep these files offline under export control laws (ITAR). Under recent ATF rules, "frames and receivers" (the
These are often "single-shot" or low-durability items compared to traditional steel or aluminum firearms.