Modified from WF3Ds to fit the one from the game a bit more and to make painting a tad bit easier.
Recommended printing vertically with supports (tree supports work wonders on this). NOTE: some printers can handle the overhang with no problems and don't require supports.
I'm no artist, so I've attached the .blend file in case you want to work on it more.
The model is a toy, not a weapon!
PRINTER SETTINGS
Printer: Ender 3 Pro + Mods
Supports: Yes (tree if possible)
Infil: 20% (Would recommend a higher shell count as the infill can be seen from the outside if it is too low)
Resolution: 0.2mm
Nozzle: 0.4mmThe author remixed this model.

It was modified to be more like the one found in the game and easier to hold, plus a few other tweaks.