It's Leatherneck's head. ONe of the few that I didn't totally screw up. lol. I did another custom with Leatherneck's head on Flint's body; Sgt. Obsidian (named after a buddy in Japan). I use Lt. Graydon quite a bit. He's a great custom for me because I didn't repaint anything (ie; no chipping). You guys get the idea of who I am using. They may not be my ultimate faves, but those are the Core group...

Maybe I should revamp the theme...