In the opening scene, Rick fires more shots than his pistol could hold without time to reload.
When Hunter is talking to Sgt. Peterson, he says that the homeless guy is a "Congressional Medal of Honor Winner." First, it is the Medal of Honor. Second, it is awarded, NOT "Won" You do not" win the medal, it is awarded.
In the beginning of the scene at the warehouse (when the homeless Vietnam veteran gets beaten up) the Boom mic is clearly visible.