Under the Gun (2005)

Synopsis
When a successful businessman's life takes a sharp turn for the worse, he targets his co-workers for death in actor-turned-director Jesse Bean's dark directorial debut. The trouble starts when Dan (Bean) loses an important promotion to co-worker Bill (Christopher Atkins). As tension begins to take a toll on Dan, his troubles are compounded when in the course of one tragic week he loses his baby, his wife, and his job. Now armed with a handgun and overwhelmed with delusion and despair, Dan hatches a deadly plan to get back at all of those he believes have done him wrong. ~ Jason Buchanan, All Movie Guide