User talk:Louis/3D-printed firearms and the technical basis for printer mandates

3D printed guns and "the law".

Hey Louis and team. The wiki is for the most part correct. "3d printed firearms" are usually a printed frame or receiver and the rest of the parts are commercially available parts that are not regulated. But something the article doesn't take into account is that it is legal to machine or build your own firearm. The Gun Control Act of 1968 allows the manufacture of firearms for personal use. They may not be sold or transfered without a Federal Firearms License (FFL) and you can not make Class 3 items (items related by the National Firearms Act: suppressors, full auto guns, short barreled rifles, etc). This is why it's legal to buy 80% receivers for the AR-15 (traditionally what is used for so called "ghost guns"). They are an AR-15 lower receiver machined to 80% and are not serialized. The user must machine the remaining 20% to make a functioning lower receiver and requires tools and some know how. According to federal law, 3d printing a firearm is not illegal unless it is sold or transferred without a license. It is already illegal to manufacture parts to make a firearm fully automatic (meaning it will fire multiple rounds per trigger pull), as well as suppressors, unless you have the MULTIPLE LICENSES required.

https://www.atf.gov/firearms/privately-made-firearms 185.189.25.171 13:45, 2 June 2026 (UTC)

People v. Gatalog Foundation Inc., Cal. Super. Ct., 2/6/26 and Ctrlpew LLC v. Chiu

California is suing Gatalog and CTRLPew LLC over 3D printed gun files they distribute online. CTRLPew LLC represented by Matthew Larosiere is countersuing in Florida

search Ctrlpew LLC v. Chiu, 6:26-cv-00340 on courtlistener for more details. Liketomakemoney (talk) 15:27, 2 June 2026 (UTC)

Sources and links related to these 2 civil lawsuits

https://www.courtlistener.com/docket/72258981/ctrlpew-llc-v-chiu/

https://www.ammoland.com/2026/05/ctrlpew-california-3d-gun-files-lawsuit/

https://apnews.com/article/lawsuits-general-news-california-rob-bonta-david-chiu-a914142cef3624cf1341fddea498bd88

https://3dprintingindustry.com/news/from-download-to-deadly-california-sues-operators-of-3d-printed-gun-network-249575/ Liketomakemoney (talk) 15:51, 2 June 2026 (UTC)

This one is a lot worse than it seems. The files are on servers which as far as I can tell have zero connection to CA. CA says that the fact that the files are accessible in CA is the core issue. The implication is that even if you had posted the files 10 years ago, and then completely forgotten, you could still be sued by them. The only way to be in compliance would be to:

• Monitor the laws of states you don't live in
• Find every time you posted something on the internet that might violate that law
• Remove all of them
• Never post them on the open internet again, unless the site you're hosting it on has enough controls to let you block the files in that jurisdiction

Xp (talk) 03:36, 3 June 2026 (UTC)

WA HB2320/2321

For those unaware, Washington state passed house bill 2320 which bans using a 3D printer or CNC machine to make a firearm; of course this is a violation of the second amendment which has enshrined the legality of manufacturing a firearm for personal use. Beyond this it is a disgusting violation of the first amendment by making it illegal to even possess the files, hooray for thought crimes! They also want to force printer manufacturers to put “blocks” in printers to somehow detect firearms and components and block them being printed. On the whole it is completely insane, but signed into law because the state’s governor cares not for the Constitution or any previous case law or legal precedent. 50.175.37.99 21:40, 2 June 2026 (UTC)

The Liberator

Years ago when this issue first came around someone created a fully 3D printed gun, called the ‘Liberator’. I was curious, so I downloaded it and tried to print on my crappy Davinci xyz. That thing was a mess of cylinders, springs, and various parts that look nothing like a gun. It was difficult to print and put together. I know it was over a decade ago and 3D printing is infinitely eaiser, but if I did it now, it still would be a difficult process to print and build. Then in the end all I had was a plastic zip gun that nobody would ever try to use because an explosion. Is far more likely than a successful shot. And, like Lou’s said in the video, each individual part looked NOTHING like a gun. Any sort of software would have to be able to infer intention from a cylinder with a hole. It’s fundamentally impossible. Cristiana (talk) 00:10, 3 June 2026 (UTC)

Do you have a picture of this gun you printed? I'm just curious. 47.160.186.158 00:46, 3 June 2026 (UTC)

This gun is legit untested and a grenade that will blow up when you fire it

https://en.wikipedia.org/wiki/Liberator_(gun) Liketomakemoney (talk) 09:13, 3 June 2026 (UTC)

Support Material and Other G-Code Complications, and Restricted vs Non-Restricted Parts

I added a short note to the NY article already, but something that further complicates analysis of G-Code is that it includes things like support material and brim, which are not intended to be part of the final model. The user of the slicer has control over the pattern, density, and angle of the infill and supports. This means that g-code analysis would have even worse accuracy, because it needs to figure out, on its own, what is actually intended to be part of the final product and what is intended to be removed manually. There is also "infill", which is material added to interior spaces of prints to provide support for layers above. On top of that, there's also the issue that you can orient the print on different sides or on different angles, which will also change the pattern of support material and infill.

Furthermore, the detection of firearm parts is further complicated by the fact that, even if you live in a jurisdiction that prohibits privately-made-firearms, you can still print other firearm components if the jurisdiction does not also prohibit those. Something like the Ruger RXM has a frame that is almost identical to a Glock frame. However, the RXM frame is not the serialized part of the RXM - it has a serialized fire control unit like the P320. This means that in such a jurisdiction, it would actually be legal to print, yet it is likely to trigger false positives due to similarity with the Glock frame. Xp (talk) 03:47, 3 June 2026 (UTC)