This is a 3D-printable wye for usage on a Nerf blaster.
Like store-bought wyes, the hopper goes into the angled slot, the stub goes into the slot below the hopper slot, and the barrel goes into the remaining slot.
The STL with "half" in the name is a cutaway to show the design of this thing so you can tell me if you think it'll work.
Changelog:
Mk 4: Area for dart to drop into added.
Mk 3: Curves smoothed from 24-point circle to 96-point circle, inside rounded to fit dart.
Mk 2: Sights removed, dart ramp included.
Mk 1: Original, would not print correctly, wrong sizing.