Near the end, after Zeke tosses the grenade into, and Goldman enters, the storage room, Tho stands up and levels his aim on Goldman in the close up, but but in the long shots intercut into the scene, Tho is still raising the gun.
The M1911 standard capacity for the military was 7+1, for a total of 8 rounds with one in the chamber. Lt. Goldman fires 7 times into the room at the VC colonel. When Lt. Goldman fires the final shot to stop the colonel he should be empty and the slide should be locked back on an empty magazine, but the slide is seen in the forward position.
Two MPs stand guard outside the door of the hospital room. Yet they fail to hear the loud struggle inside the room (complete with yells, grunts and groans and meal trays flying).