| 21. | The exposed rear sight had no protective ears and was vulnerable to breakage.
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| 22. | A Novak Lo-Mount rear sight was installed on a small number of 4505s.
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| 23. | The rear sight is a simple diopter with screw adjustment.
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| 24. | The barrel was lengthened and the distance between front and rear sights was increased.
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| 25. | The Weaver-style rail incorporates a fully adjustable rear sight and a removable front sight.
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| 26. | The rear sight, mounted on the detachable handle, is adjustable for windage and elevation.
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| 27. | The rear sight is used for windage adjustment and to change the zero range.
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| 28. | The tracks of the rear sight obstructed the view to the sides during aiming.
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| 29. | The front end houses a hinge block holding the barrel and the rear sight.
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| 30. | All models have fixed front sights and adjustable rear sights.
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