>>8588
I will answer semi-seriously and select my words with due care.
In the US, at least, you can build stuff for yourself, so long as you color within certain legal lines. You can't sell it. You have to do all the machining yourself, no sending blueprints to a machine shop labeled "hinge bushing." It can't be a commercial enterprise. There is an idea I have for a .22 target pistol with a receiver made from a length of 1" OD, 3/4" ID, seamless aluminum tubing. It would be based on a very well known design, but lighter, with some little details altered, like instead of the dovetail cut in front of the hole for the bolt stop pin, there'd be a flat milled on that surface at that location to mount a red dot sight, and so forth. That plus a skinny contour barrel would take about 12oz off the weight, according to my estimates. It still wouldn't be the lightest or most compact .22 but it'd be different, at least, and the idea appeals to me.
But what I have in mind with the idea of vibe-coding for OpenSCAD is an optical sight mount for an existing firearm. It does not, so far as I can determine, have any legal >implications whatsoever, at least in the US.