To answer yer questions, yer. It was drawn "by hand" on my Wacom tablet, using a few graphic programs.
The gun? Dunno. It was made quickly. "Oh, let's make it luger-style, it'll look cool".
The whole thing is a sketch, it isn't a masterpiece or a finished work, just fooling around with proportions, fat, and a bit of lighting.
Fenks everyone for your e-applauses.