FTN4 is the best printed suppressor out there. There are options for 22lr, 556, 308, 9mm, and 45. They need reinforcement, either an aluminum tube or a carbon fiber sleeve. With suppressors tax dropping next year, someone may come up with a better design eventually. However, the FTN series of suppressors is quite robust and can handle FA rates of fire, especially when it's made of PA6-CF or even better, PPA-CF.

I went through 2kg of 72D TPU testing it in several different designs. You can find my report on Odysee, but the tldr; is it didn't work - even with design changes. I'm now exploring the capabilities of PCTG (with much better results).

But the bottom line is that some materials have limitations that you just can't design around. PETG, PC, and artistic PLA are always going to be poor choices for most functional firearms parts.

Dude, seriously, thank you for this. We really needed a place of our own to talk openly about our hobby and honestly it was just a matter of time before reddit gave us the boot. This forum format is leagues better than Discord, which makes it hard to find answers to questions asked some time ago. I know we lost a treasure trove of information and a lot of fosscad history with r/fosscad being deleted but hopefully we can rebuild it here.