Movies
Let me say it one more time: I have a gun, it’s loaded, shut up, okay?
— Gus · The Ref

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
A frazzled threat that keeps getting repeated. The speaker has a gun, it's loaded, and everyone should be quiet, but the 'one more time' and the tacked-on 'okay?' make it sound more like a tired person losing patience than a truly commanding menace.
Context reviewed