NAL; NLA; DYOR.

The guy who posted this on Reddit really seems to like the attention.

He didn't mention it was a DC charge until challenged on it.

Granted D.C. Doesn't have a FRT ban, it's the same language as the federal statute.

https://code.dccouncil.gov/us/dc/council/code/sections/7-2502.02 - granted all weapons in DC need some form of registration it seems.

I think the ATF is trying to fuck over a nobody to set court precedent on FRTs …

Any of the "engineering-grade" materials (PA6-CF, PA612-CF, PA12-CF, PPA-CF, PPS-CF, etc.) can work well for suppressors assuming:

1. Your printer can handle them.
2. You can properly dry the filament (drying at > 80 °C).
3. You get the print settings right.
4. You can properly anneal the parts (annealing dry at > 100 °C).

Technically, achieving good layer adhesion is the biggest challenge. You need a somewhat controlled environment so you…

Just my $0.02, but I don't think polymer FDM technology will ever be suitable for gas system components. So if you go down that path, you're looking at sophisticated DIY metal parts that it will put the design out of reach of most people. ECM may be viable for some of these parts, but there's a pretty big skill gap between cutting a barrel tube to length (where actual length doesn't matter at all to the process), and cutting bar stock to the rou…