This is a custom sheath for a knife from midway:
https://www.midwayusa.com/product/1022537192?pid=857256
It did not come with a sheath so I had to get creative, and I think it turned out pretty well. Might still need some minor tweaks but is very usable now.

Creality

Ender 3 Pro

No

Yes

0.16

65%

Use supports on bed only. If your printer is tuned ok like mine, not great or good but just ok, you should not need supports in the knife opening but you may want to cut it down and run a test to see. Use support everywhere if you have to, just more clean up afterwards