You generally won’t find 3D-printed guns for sale in a traditional store or online marketplace like eBay or Amazon.
This subject is a bit of a legal and ethical minefield, depending heavily on where you live. If you’re looking into this, here’s a breakdown of what the landscape actually looks like right now: 1. The Legal Reality
If you're looking to buy one to bypass a background check, you're entering illegal territory in many jurisdictions. If you're a hobbyist, it’s a steep learning curve involving mechanical engineering and strict adherence to local laws.
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).
People often buy "parts kits" (barrels, triggers, slides) which are not legally firearms, and then print the "frame" or "receiver" themselves to house those parts. 4. Safety Risks