I designed this to use for a custom nerf gun.
I have tested it up to 100psi with no issues, Just test at lower pressures before going up to the high numbers (I would suggest 30-40psi and hold it underwater to check for leaks). I will not be held responsible for any injuries caused by this model, only use at pressures you are comfortable with

The hole in the top fits 1/4" fittings but you may need to heat up the fitting slightly to help it screw in, there are no threads in the hole so you need to forcefully screw in the fitting to make the threads yourself. Use plumbers tape if you're worried about leaks, I had no need for it as I melted the fitting into the hole.

I'm in the process of printing/testing a taller, slimmer model that would fit much better into a nerf gun design.

Longer

Longer LK5 Pro

Doesn't Matter

No

0.1-0.2mm

100% (Very Important)

Print at a high temperature to ensure a solid print and prevent air leaks