Suspect this is just staged. George never got his guns level in teh closing gunfight either. Just because I notice details, look at the two pistols. The left one is cocked and the right one isn't. Duke's rifle is way off line and George has him covered. This gunfight would have had a different outcome.
Probably, but it almost looks "mid-gunfight"-Duke has fired and looks to have recocked his gun, and George may have fired one gun. Smoke appears to be from Duke's shot, but no smoke from George's shot. Interesting pic nonetheless...