Airsoft Amplifier - Make Your Own

thingiverse

Literally just a 28mm diameter circle, 16mm deep, with a 14x1mm right-hand thread. Screws are recommended; super glue might also do the trick. Once you've finished printing, hold the adapter in the center of whatever cap you're using and draw around the hole with a marker or pencil. Cut along that line with a thin, sharp knife - X-ACTO knives work really well. Screw the adapter to the cap, then screw the assembly to the bottle, and enjoy life at full volume. Like my r/speedsoft amp, you might need to experiment with scaling or extrusion to get the threads just right. If you've got a high-quality printer, it should turn out perfectly fine. https://www.youtube.com/watch?v=abC1Y_VbeXs