If they are at a medium distance, use a medium-range gun, and if they are close, you guessed it, use a close-range gun.
We all need the right tools, err gun, for the job. That said, depending on where your enemy is, choose the gun with the appropriate range. If someone’s far away, use a long-range gun. If they are at a medium distance, use a medium-range gun, and if they are close, you guessed it, use a close-range gun.