Green highlighter to color the reservoir and cheap acrylic paint on the body.
Not perfectly 1/12 scale but it's close enough. I've only had it printed as Frosted Ultra Detail so I don't know how other materials would turn out. (edit 3/21: someone tried to order this with WSFP and it turns out the trigger guard is too small, so it's detail only I guess)
6.37 w x
2.588 d x
2.508 w x
1.019 d x