Matt gets the drop on Travers and tells him to put his hands up. Travers does so, still holding his rifle in one hand. The camera changes to Matt, then back to Travers and the rifle is gone. Matt didn't tell him to put it down, and there was no sound of it dropping.
The sound of crickets chirping during the night scenes were clearly on a 7 second loop because you can hear the loop repeat mid-chirp. This loop repeats continuously for about four and a half minutes during this episode.