When Lilly is blocked by the large guy approximately halfway through the episode, he pulls out a pistol that is clearly a Glock. After Lilly takes the gun and he tells her it has no bullets, she pulls the trigger multiple times and a click can be heard with each trigger pull. That type of pistol is a striker fired gun and the trigger would only click once and she would have to pull the back the slide to reset the trigger to make it click again.
During the opening scenes it is quite obvious that the abandoned truck is a fake.