Nice vingnette there.
The part I don't particularly like is the positioning of the figures. When one guy is using the corner as cover, we can assume he's being cautious for obvious reasons. But then the guy with the Tommy gun is right in the middle of that doorway in plain sight, (given that it appears that the building is ruined) and it doesn't look to me like he's running for cover or anything.

If I were you I would move him closer to the guy at the corner.
I hope I wasn't overly critical!
Scott