What happens when the government decides what you’re allowed to make in your own home? California’s AB 2047 would require 3D printers to screen designs before they can be printed. Supporters say it’s about guns. Critics say it could create something much bigger: a system that can inspect, block, and potentially monitor what you create.

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SOURCES & CITATIONS AB 2047 — California Legislative Information: https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260AB2047 CalMatters Digital Democracy — AB 2047: https://calmatters.digitaldemocracy.org/bills/ca_202520260ab2047 NRA-ILA — California anti-Second Amendment bills: https://www.nraila.org/articles/20260814/california-anti-second-amendment-bills-advance-from-appropriations-committees California Senate Public Safety Committee — AB 2047 Analysis: https://spsf.senate.ca.gov/system/files/2026-06/ab-2047-analysis.pdf Skinner v. Railway Labor Executives’ Assn.: https://supreme.justia.com/cases/federal/us/489/602/ Governing — Hollywood Challenges California’s Ghost Gun Proposal: https://www.governing.com/policy/hollywood-challenges-californias-ghost-gun-proposal ATF — 3D-Printed “Glock Switches” and “Auto-Sears”: https://www.atf.gov/news/press-releases/trafficker-3d-printed-%E2%80%9Cglock-switches%E2%80%9D-and-%E2%80%9Cauto-sears%E2%80%9D-sentenced-over-seven-years-federal DOJ — Machinegun Conversion Devices Fact Sheet: https://www.justice.gov/usao-wdok/media/1366621/dl?inline= Everytown — New York Shuts Down the Plastic Pipeline: https://www.everytown.org/press/new-york-shuts-down-the-plastic-pipeline-governor-hochul-and-lawmakers-pass-nation-leading-measures-to-stop-the-spread-of-diy-machine-guns-and-3d-printed-firearms-in-fy27-budget/ Michael Weinberg — 3D Printers Cannot Effectively Screen for Gun Parts: https://michaelweinberg.org/blog/2026/02/04/3d-printer-gun-screen/ PBS NewsHour / Associated Press — New York 3D Printer Law: https://www.pbs.org/newshour/nation/first-of-its-kind-law-in-new-york-could-block-3d-printers-from-making-guns EFF — The Dangers of California’s Legislation to Censor 3D Printing: https://www.eff.org/deeplinks/2026/04/dangers-californias-legislation-censor-3d-printing EFF — We Can Still Stop California’s 3D Printer Surveillance Scheme: https://www.eff.org/deeplinks/2026/06/we-can-still-stop-californias-3d-printer-surveillance-scheme Louis Rossmann — False-Positive Gallery: https://www.youtube.com/watch?v=E1B2cWEaWDw Physna: https://www.physna.com/ Physna & Palantir Strategic Partnership: https://www.einpresswire.com/article/766612379/physna-and-palantir-announce-strategic-partnership-to-revolutionize-3d-data-analysis-for-defense-and-commercial-sectors Reclaim The Net — California’s 3D Printer Surveillance Proposal: https://reclaimthenet.org/california-wants-a-watcher-inside-every-3d-printer Fabbaloo — David Tobin: https://www.fabbaloo.com/news/david-tobin-is-fighting-californias-3d-printer-ghost-gun-bill 3D Printing Nerd — Stop AB2047: https://www.the3dprintingnerd.com/ab2047 3D Printing Is Not a Crime: https://3dprintingisnotacrime.org/ Louis Rossmann: https://www.youtube.com/@rossmanngroup Everytown for Gun Safety Action Fund — 2024 Form 990: https://www.everytown.org/wp-content/uploads/2026/04/EFGSAF-2024-990-Public-Disclosure-Copy.pdf Everytown — 2014 Launch: https://www.everytown.org/press/new-gun-violence-prevention-group-everytown-for-gun-safety-unites-mayors-moms-and-millions-of-americans-on-new-paths-to-victory-state-capitols-corporate-responsibility-voter-activation/ Bloomberg — Geller & Company Acquisition: https://www.prnewswire.com/news-releases/bloomberg-lp-to-acquire-dedicated-cfo-division-from-geller--company-301327412.html Floyd v. City of New York: https://law.justia.com/cases/federal/district-courts/new-york/nysdce/1:2008cv01034/320470/373/ NYCLU — 2011 Stop-and-Frisk Report: https://www.nyclu.org/uploads/2019/03/NYCLU_2011_Stop-and-Frisk_Report.pdf Reason — Politicians Consider Soviet-Style Controls on 3D Printers: https://reason.com/2026/02/25/politicians-consider-soviet-style-controls-on-3d-printers/ RAND — 3D Printing and Government Control: https://www.rand.org/pubs/perspectives/PE283.html