Fine game
The graphics were incredibly realistic, especially if this is your first flash game. The game was fairly easy to beat, although all of the challenging parts were pretty much taken away when you get the Barrett.
I also found a bug. Not sure if anybody has found it yet, but when you carry the UMP and .357, and you fire the UMP but switch to the .357 while shooting, you temporarily end up with a rapid fire .357(though this fact doesn't seem to be of particular use).
Overall, great job! I'm looking forward to your next game if you're planning on one.