Whats a man called that's all dressed in black with big black glasses and a gun?

A man dressed all in black with big black glasses and a gun is often referred to as a "gunman" or "hitman." This description may conjure images of a secretive or ominous figure, possibly a character from a movie or a stereotype of a professional enforcer. The specific term can vary based on context, such as "assassin" or "mercenary," depending on the character's role or intent.