OMGWTFBBQ AN ACTUAL DRAWING. WHAT IS THIS NONSENSE?

Yeah, it's been forever, I know. But I really like how this turned out. I was really bored and wanted to do something on Photoshop, and so I did. I also used the opportunity to practice drawing a gun.

I really want to go a bit further with this drawing, but I don't know what to do. Suggestions?

Critique is welcome as well~ :)

*Edit* Whoa, I just realized this is my 25th piece! Silver trophy, dudes! :D