I designed this small SciFi pistol for my sons. It is approximately 4.75 in / 120mm long and prints upside down without supports.
My prints were ABS with 0.25mm layers, but this should print well in many different materials.
Printer:
Fusion3 F400-S
Rafts:
No
Supports:
No
Resolution:
0.25mm
Infill:
20%
Notes:
Print upside down without supports. The STL is pre-oriented for this.