I made the SFX version of the portal gun but I modified it to use an Adafruit Feather 328P instead of the Trinket Pro. Other than running at 8MHz and 3.3V it's basically the same hardware.
I also increased the gain of the WAV files by +17 dB in Audacity because i could barely hear them.
More details here: https://github.com/Arudinne/PortalGun/tree/SFX
Atomic Filament Ultra Impact Modified White V2 PLA / Emerald Green Translucent PETG PRO
The body was printed with 4 perimeters (configured) and I used 100% infill on everything except the bulb because it wouldn't have saved much plastic.
The handle didn't come out perfect but I did some light sanding and painting. It's not too bad but I think this model could benefit from some soluble supports.
The Bulb was printed with 2 perimeters and 5% gyroid infill in Atomic Filament's Emerald Green Translucent PETG PRO