This gun is pretty big and looks awesome.
I separated the print in 5 sessions. Each session/group taking from 8 to 12 hour and the last one about 2. Had to scale down the pins that hold the gun together to 95-97%. This was my first mayor print (biggest and longest time). I learned a lot from this. I had to rotate a lot of the parts for better bed position and to get better/easier to remove supports. Some groups I printed them with a skirt others had to put a brim or it was failing.
3D Solutech PLA
I used a 5 mm brim or 4 line skirt. Zig Zag supports. 1 mm shells (top/bottom/walls)