It's actually a design from scratch inspired by Mykola_P's Parametric Clip-on Shotgun Shell Belt. I wanted to have it sturdier around the shell. The belt part is for standard 40mm Polypropylen belt strap available everywhere, but of course everything can be parametrized.

Creality

Ender 5

No

Yes

I print it at 0.12, but choose what you like

50% cubic

I used Extrudr Greentec BDP material, but it doesn't matter as long as you choose between not too hard and not too flexible. The clip around the shell will bend a little bit and apply a good pressure with Greentec (not PRO). I printed with 3 perimeters.