The armorer on the set of the movie “Rust” who was convicted of involuntary manslaughter last month in the shooting death of cinematographer Halyna Hutchins was sentenced to 18 months in prison on Monday. Hannah Gutierrez Reed, 26, sat emotionless as the verdict was read, according to CNN. Also read: ‘Pain in the neck’: CNN expert reacts to Trump’s unusual courtroom request Want more breaking political news? Click for the latest headlines at Raw Story. Hutchins, 42, was killed when a live round of ammunition was discharged from a prop gun that was being held by actor Alec Baldwin on October 21…