How to Say "gunslinger" in Spanish
The Spanish word for “gunslinger” is “pistolero” — B1 level.

Examples
El pistolero entró silenciosamente en el salón.
The gunslinger entered the saloon quietly.
En las películas del oeste, siempre hay un pistolero solitario.
In Western movies, there is always a lone gunslinger.
La policía busca al pistolero responsable del robo.
The police are looking for the gunman responsible for the robbery.
The '-ero' ending
The ending '-ero' in Spanish is often added to an object to describe the person who uses it or works with it. Since 'pistola' is a pistol, a 'pistolero' is the person using it.
The 'Personal A'
If you are talking about seeing, finding, or calling a 'pistolero,' you must put the little word 'a' before it (e.g., 'Vi a un pistolero'). This happens because the gunman is a person receiving the action.
Confusing with soldiers
Mistake: “Using 'pistolero' for a professional soldier in the army.”
Correction: Use 'soldado' for the military. A 'pistolero' is usually an outlaw, a criminal, or a character in a movie.
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