Caveat up front: I don't actually know much about them, so maybe this post doesn't necessarily fit here... Sorry if that's the case! If they're like not cool or something, somebody please let me know lol.

Reddit banned all the open hardware/3d printed/FOSS gun subs, so they started a Lemmy instance. It's even got an archive of ported-over posts. Here's some of their communities:

• !3D2A@fosscad.io
• !bazaar@fosscad.io
• !supersafety@fosscad.io