Nice
It could've been better though, not saying I'm an excellent artist or anything but this could've been better. As 'boomboomblam' already pointed out, the gun is alright but could've been more awesome. Also what the fuck is up with his hands.
But apart from that, it's really well done, I can't photoshop for shit, the colors are really well blended and atmospheric and above all you went totally apeshit with the original concept of Dad himself.
Sooo... my score is an 8/10 and a 4/5. Enjoy and keep going!