This is a mock up of the hook Kratos uses in the newest God of War to holster his axe, it has a back piece that keeps it at an angle so you are able to hook it easier. It's not a 1:1 replica but its close enough and actually works.
My axe wasn't 1:1 size either it was slightly smaller so make sure you just measure the thinner part of the axe shaft to the opening of the omega symbol to make sure it will fit!
Prints in two pieces to avoid the need of supports.
Let me know any thoughts/suggestions in the comments, and if you make it I'd love to see it holding your axe!
I didn't print at 100% infill but I just put that as as suggestion for strength.
I just used a nickel craft paint and then feathered on a darker gunmetal paint to make the metal look a little worn down.