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  2. Iron sights - Wikipedia

    en.wikipedia.org/wiki/Iron_sights

    With tangent sights, the rear sight is often used to adjust the elevation, and the front the windage. The M16A2 later M16 series rifles have a dial adjustable range calibrated rear sight, and use an elevation adjustable front sight to "zero" the rifle at a given range. The rear sight is used for windage adjustment and to change the zero range.

  3. Rifleman's rule - Wikipedia

    en.wikipedia.org/wiki/Rifleman's_rule

    Assume a rifle is being fired that shoots with the bullet drop table given in Table 1. This means that the rifle sight setting for any range from 0 to 500 meters is available. The sight adjustment procedure can be followed step-by-step. 1. Determine the slant range to the target.

  4. Sighting in - Wikipedia

    en.wikipedia.org/wiki/Sighting_in

    The iterative procedure involves firing a group of shots from a cool gun barrel, then determining the geometric center of the shot pattern, adjusting the sights to move the point of aim to that group center, and repeating the process until further groups consistently center on the point of aim.

  5. Diopter sight - Wikipedia

    en.wikipedia.org/wiki/Diopter_sight

    Target shooting diopter of a 10 metre air rifle with a mounted semi-transparent occluder for the non-aiming eye. A diopter sight is an aperture sight component used to assist the aiming of ranged weapons, mainly firearms, airguns, and crossbows. Diopters function to precisely align the shooter's eye with the front sight and the target, while ...

  6. Milliradian - Wikipedia

    en.wikipedia.org/wiki/Milliradian

    A milliradian (SI-symbol mrad, sometimes also abbreviated mil) is an SI derived unit for angular measurement which is defined as a thousandth of a radian (0.001 radian). ). Milliradians are used in adjustment of firearm sights by adjusting the angle of the sight compared to the barrel (up, down, left, or

  7. C79 optical sight - Wikipedia

    en.wikipedia.org/wiki/C79_optical_sight

    Two adjustment knobs are used to secure the base to the receiver. A bore-sighting device is usually used to roughly zero the sight before a first-time shooter takes it to the range. Adjustments come in 0.25-mil clicks (one mil equals 10 cm at a range of 100 m, so each click adjusts the sight by 2.5 cm at 100 m). Sighting in a C79 sight is ...

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  9. Accurizing - Wikipedia

    en.wikipedia.org/wiki/Accurizing

    Comparison of milliradian (mil) and minute of arc (moa).. Since adjusting the point of impact to match the point of aim is relatively simple with any type of adjustable sights, the primary goal of accurizing is to increase the precision of the firearm, which is generally measured by looking at the dispersion of a number of shots fired at the same point of aim.