Most recent illustration. (bigger version on my artstation https://magaliboe.artstation.com/)
Here's a small progress step:
sketch n gradient
ambiance and some color blotches
get in there nice n good.
In the end i lifted the gun to fit the perspecive, added a bunch of obscene tattoos, and rendered some more. Hope you enjoy and please let me know if you have any feedback, love or hate!