This is a holster for the Ruger 22/45 Mark IV Lite pistol. It can accept a suppressor as that is how I carry mine. The hood is a little thinner than the original model, I tried to squeeze it and banged it around with no issues. I suggest PETG or better. 

My settings:
Filament - eSUN PETG
Temp - 245c
Layer Height - .20
Walls - 5
Infill - 30%

No supports, print muzzle end down and flat on the bed, I suggest a raft because the front is not that fat to begin with.

This is the belt clip I used - (https://a.co/d/0cDmczpx) any of the standard ones will work I'm sure. (it comes with 4 screws, the 4th one can be used on the retention hole)

This is a printable option - (https://www.printables.com/model/775183-rigid-belt-mount-for-pistol-holsters-38-mm-hole-di)

Please let me know if there is anything I can do to get you working.