Towards the end, when Stephanie fires the pistol in the air, the slide stays open but Leland has the magazine in the tuxedo bag. The slide would only stay open if there were an empty magazine in the pistol.
IRAAG: The slide would lock backward in the open position if there were no magazine in the pistol or the magazine was empty. If there was a round in the chamber and the slide was locked forward, the pistol would fire, but would lock open.
IRAAG: The slide would lock backward in the open position if there were no magazine in the pistol or the magazine was empty. If there was a round in the chamber and the slide was locked forward, the pistol would fire, but would lock open.
In the final scene, as the bridal party walks off the beach at sunset, the overhead shot shows their shadows falling to the west, towards the sun.
When Stephanie fires the gun within walking distance to the police station, nobody nearby reacts to the shot. No officers come running up, and people can be seen continuing to walk around as if nothing happened in the background.