At the end, when Raylene is pointing the gun at Shawn and Gus, Juliet sneaks up behind them and when Juliet points her gun at Raylene you can hear Juliet fasten the hammer of her handgun. However, she has a Glock, which does not have an external hammer.
As Gus and Shawn exit the car at the mausoleum, a crew person's face can clearly be seen in the rear-view mirror.