For a Model 1903, remove the magazine, open the action and check the chamber to insure it is empty. Release safety. Push slide to the rear until the line/arrow on the RIGHT front of the slide frame meet. While holding at that point, turn the barrel. unlocking it, then move slide forward off the frame. Barel may now be removed for cleaning. I do NOT recommend further disassembly. NOTE: The 1st version of the 1903 used a barrel bushing, and a different process.
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