gunslinger
US /ˈɡʌnˌslɪŋ.ɚ/
UK /ˈɡʌnˌslɪŋ.ɚ/

1.
pistolero, tirador
a man, especially in the American West, who carries and is skilled in using a gun
:
•
The legendary gunslinger faced his rival at high noon.
El legendario pistolero se enfrentó a su rival al mediodía.
•
Many Western films feature a lone gunslinger seeking justice.
Muchas películas del Oeste presentan a un pistolero solitario en busca de justicia.