First off, I don't play 40K. This is just a model I liked and made changes to suit me. I split it apart to be more printable as well I removed some of the details I didn't care for. It felt a little big to me so I it's been scaled down to 75%. The alignment holes are supposed to 3/16". I couldn't get the gun to print well, but it's there if you want to try.
Printer Brand:
Creality
Printer:
Ender 3
Rafts:
No
Supports:
Yes
Resolution:
0.2mm
Infill:
10
Filament: Inland PLA "Green" ... WTF?