Voronoi Gun

Meshmixer has some cool patterns you can apply to models. I roughly modeled the shape of a glock and tweaked some dimensions for printing.

Print with the top of the gun on the base of the bed. .3mm layer height is perfectly fine. No supports needed.

Here is a video from make anything describing the process if you want to make something like this with any kind of model you make.
https://www.youtube.com/watch?v=8hrFvUEZg8g