As I recall, the idea was that you could shoot it with one hand, a difficult feat at best with a standard lever-action rifle. Supposedly Lucas McCain used it for rapid fire, having been a gunman before he settled down to raise a kid. Hard to imagine how you could get any kind of accuracy with the thing. John Wayne should have saved his, it would have been handy in Rio Bravo when one of his arms was disabled and he had to go into a gunfight.
I remember having a toy version when I was a kid. There was a little flip down lever in the trigger guard that would pull the trigger when you brought the lever up. You could also push it down against the inside of the guard so it didn't contact the trigger. It didn't have the big loop like McCain's, but you could fire as fast as you could jack the lever. Kind of like fanning a pistol hammer. Looks cool on the screen but not of much practical value.
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