tirador

a slingshot; a Y-shaped stick with an elastic sling between the arms used for shooting small projectiles
(biblical) a sling; an instrument for throwing stones or other missiles, consisting of a short strap with two strings fastened to its ends, or with a string fastened to one end and a light stick to the other; a shepherd's sling
a shooter; someone who shoots something, especially with a gun
a hitman; a contract killer
a gunman; a criminal armed with a gun, especially a professional killer