User talk:Louis/3D printer firearm-blocking mandates and geometric false positives

Possible inclusion? - The homemade firearm scene

If you track the posts from Brazil police raids, you would notice a lot of 3D printed guns, but more importantly, for the lower-end gangs, they have low-effort 3D models also involved. Included is one of my preferred homemade gun repositories that can be referenced for other geometric false positives.

https://homemadeguns.wordpress.com/

A hefty amount of examples from this website I would like to highlight

- https://homemadeguns.wordpress.com/2025/11/21/cbs-inside-the-3d2a-movement/

Gun smuggling methods - fake labubus and peculiar lunchboxes. I find the Hell 'O' Kitty to be notable since it looks a lot like a generic lunch pail on first glance, despite this being a transforming firearm akin to those suitcase guns.

- https://homemadeguns.wordpress.com/2025/11/02/3d-printed-magazine-springs/

3D Printed magazine springs - Mostly notable because look at how simple of a mechanism this is disassembled. This zigzag method could be easily abused as hidden infill in a model.

- https://homemadeguns.wordpress.com/2025/11/02/mac-11-type-smg-brazil/

https://homemadeguns.wordpress.com/2024/11/30/the-decker-380-3d-printed-semi-automatic-carbine/

Generic shaped firearms - While the first example was actually welded from metal parts, this PAM-2 serves as a good example as to how simple the design of a gun can get, those blocky elements alone serve as a great method to bypass traditional detection algorithms expecting illegal firearms to match the shape of existing firearms. The Decker 380 is another good example, and this one IS 3D printed!

- https://homemadeguns.wordpress.com/2025/09/15/school-yard-zip-gun/

Zip guns - Included to demonstrate how simple these can get, I mean seriously, a metal tube, something to strike the bullet, and something elastic to give it velocity on return. Can't get any simpler with a zip gun, and why you can't design anything to defeat this.

- https://homemadeguns.wordpress.com/2024/04/25/evidencia/

Pump shotty - Another example of simple firearms, and this is just made from bike frame parts welded together.

- https://homemadeguns.wordpress.com/2025/09/15/kneecappers-south-australia/

Kneecappers - Not really relevant to the article, but I just want to show it off since people mod cheap center punches for this job

- https://homemadeguns.wordpress.com/2025/06/20/ryno-3d-printed-revolver-seized-boston/

Ryno 22s - A fully original 3D printed revolver design, and you can deconstruct various ways to change it, plus pre-sliced files are already out on the market... JamesTDG (talk) 12:00, 3 June 2026 (UTC)

Corner Brackets

The shape stuff can get really stupid really quickly especially if they use Ai logic.

This is from Gemini on a search I did looking at brackets for fun after watching your latest video.

This gcode would be very similar as the path for the bracket would match the outline of a gun.

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AI Overview

A corner bracket (often called an L-bracket) is indeed L-shaped, similar to the grip and barrel of a handgun. This shape gives it the structural strength needed to reinforce 90-degree joints, such as those on shelves, cabinets, and tables.

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A bracket from bunnings

https://media.bunnings.com.au/api/public/content/76acd2713d9047a6b4f9c4d216b9b91e?v=695fa3f1&t=w700dpr1 220.244.244.115 07:35, 4 June 2026 (UTC)