I know everyone has their “go-to” filament(s) for various parts. For me with 2A, it is usually PLA+, PAHT-CF, and PPA-CF. What I have really enjoyed about this filament is how easy the supports were to dial in. They pop right off and leave a pretty good looking contact point.
My Urutau’s bolt and upper receiver, both in PLA+, developed a crack recently and figured I might as well reprint the handgaurd while I was at it.
I use Elegoo for PAHT-CF and Siraya Tech’s Core Black for PPA-CF. My K1C print the Core version better than the standard version when it comes to their PPA-CF. I know a lot of people view Elegoo’s stuff as lower quality, but if performs amazingly for me and my Kobra S1 can print it. The Kobra gives me all kinds of grief with PPA-CF though.