[Johnny C. Kitchens]

The little piece in question is attached to the frame. I looked at all of the frames of the scene. In one frame the three proof marks on the receiver show a little better. Yes, the gun jammed and the actor is struggling with it. In the last two frames of the scene, it almost appears as if the toggle breaks, but I'm not sure. The little piece almost appears to be holding the gun open. No guesses as to the movie title???