One of my good friends is in the army and he's really proud of what he does.  He liked the military symbol of two guns criss-crossed but he didn't want to be so typical so he asked me to cross a M4 gun with a machete. He also asked me to include he dogtags some how.  So this is what I came up with.  Shortly after I finished it, he paid $1,600 to get this tattooed on his back.  The piece covered his entire back. 

Army Boy Tattoo - Pencil on Paper