Please be aware, that these types of knives are prohibited in Canada.
This is a minor remix of the trunnions which now include printed threads. There are 2 versions of the trunnions available. One set which looks similar to the originals, and a second set which has some knurling and makes it easier to do blade changes.
I'd recommend printing the trunnions at a 0.10mm layer height.
Other than the blade, there's no additional hardware required.
If you'd like to support the original designer, you can find their design here:
https://www.printables.com/model/561605-knife-mk5-gravity-knife-for-utility-blades
The author remixed this model.
Replaced the Blade Holder trunnion's with a printed screw & cap