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