Punisher

Here's my version of Marvel Comics' Punisher, Frank Castle. I struggled with his face, and he still looks a little crazed, but I like the way it turned out. I got the pose from one of those reference websites, but the quality was bad and I couldn't quite make out the details of the rifle. Does anybody know any good rifle ref pictures? Any tips on rendering pencils in the comic style? I'm still a little unsure when I do clothes--especially jeans.

Prismacolor Turquoise Pencils, B, 2B, maybe some others, I can't remember right now. This took me 3 or 4 hours.

Thanks for looking!