> Like everything in the United States, it’s actually gun manufacturers that want to clamp down on this cottage industry which threatens their profits.

I have 0 reason to believe this.

That is some pretty wild speculation, and a terribly risky proposition for any company because they would instantly get blackballed by the 2a community.

Any gun company caught funding anything remotely anti-2A would be met with an unbelievably negative reaction from the firearms community and face boycotts and massive reputational damage. It absolutely would not be worth it for them to do this. I can maybe see the arguments that perhaps it’s really a proxy for the anti right to repair groups, but absolutely not the firearms manufacturers.

Look up Everytown for Gun Safety, they are behund this...

https://www.nraila.org/articles/20251027/from-printers-to-pa...

I think they don't give a shit about 3D printing, especially in CA. It's not like you're competing with a glock19 type hand gun and cornering this market.

This is the most likely answer. Just as it was the large grocery chains that have funded all the plastic/paper bag bans.

The gun lobby has a long history of trying to ban low cost market entrants.