At 5:13, it shows a Marine Captain wearing "scrambled eggs" on his service cap. Marine officers do not wear "scrambled eggs" on their service caps or their dress caps until they reach the rank of Major.
The revolver Alma carries is a Ruger LCR, depending on the caliber it either holds five, six or eight rounds, however by far the most common caliber for it is the .38 Special, which holds five rounds. When she fires it the gun clicks empty after seven shots, and she did not have enough time to reload at all.