Yeah, a Marine could indeed have done the shooting no problem and not a doubt about that. 81 meters? The Marine rifle course -begins- at 200, and goes out to 500. And that ain’t sitting in a comfortable window with a soda.
But the question is, if he was a communist, why did he shoot the JFK? Did he go after the people attacking the president constantly accused of being soft on the communists? Noooo... he shoots his own guy supposedly.
Who benefits? We all know who benefits, the people who want documents from 1963 to remain hidden.
Oliver Stone had way more right than wrong.