The belt and the six-shot shooter are a scattering symbol. When it stops on two reels, the tension gradually increases and the right reel is hit and broken until it stops. If there is a third distraction in the field of view when stopped, the player will get a free spin.
Before they start, you can choose to make the girl a growing wild symbol in a round, or choose a gunman who adds random extra wildness to the reel. Although the average return for each character is roughly the same, as long as you get any of the features, you will see a wonderful animation of the shooting gun in the game.