"The U.S. Holsters shown with the 1917's are they carried butt forward? They look like a left handed holster carried on the wrong side. How do you draw the handgun out of them?

It's called the cavalry draw. You turn your hand so that the back of it is towards your side and twist as you draw. Remember, the principal weapon of the cavalry trooper was the sword, carried on the left side and drawn with the right hand. The revolver was drawn with the left hand.

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John 3:16
WAR EAGLE!