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  2. Telescopic sight - Wikipedia

    en.wikipedia.org/wiki/Telescopic_sight

    A telescopic sight can have several manual adjustment controls in the form of control knobs or coaxial rings. Diopter adjustment (also called the ocular focus) on the eyepiece — meant to obtain a sharp picture of the target object and reticle. Elevation control – meant to adjust (or "track") the vertical deviation of the optical axis ...

  3. C79 optical sight - Wikipedia

    en.wikipedia.org/wiki/C79_optical_sight

    The windage adjustment is intended only for the initial sighting in procedure of the C79. Elevation adjustments are made via a rotary knob and are adjusted from 200 to 800 m. To bring the sight to a proper elevation zero, a small "gate" must be elevated which disconnects the elevation cam and one mil clicks can now be made.

  4. Rifleman's rule - Wikipedia

    en.wikipedia.org/wiki/Rifleman's_rule

    If the rifleman wishes to adjust his rifle to strike a target at a distance instead of along an incline, he needs to adjust the bore angle of his rifle so that the bullet will strike the target at . This requires adjusting the rifle to a horizontal zero distance setting of R Z e r o = R H cos ⁡ ( α ) {\displaystyle R_{Zero}=R_{H}\cos(\alpha )} .

  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. Advanced Combat Optical Gunsight - Wikipedia

    en.wikipedia.org/wiki/Advanced_Combat_Optical...

    The first ACOG model, known as the TA01, was released in 1987. [3] [4] An example was tested on the Stoner 93 in the early 1990s by the Royal Thai Armed Forces. [5]In 1995, United States Special Operations Command selected the 4×32 TA01 as the official scope for the M4 carbine and purchased 12,000 units from Trijicon. [6]

  8. Iron sights - Wikipedia

    en.wikipedia.org/wiki/Iron_sights

    Many modern iron sights are designed to be adjustable for sighting in firearms by adjusting the sights for elevation or windage. [2] On many firearms it is the rear sight that is adjustable. For precision shooting applications such as varminting or sniping , the iron sights are usually replaced by a telescopic sight .

  9. AN/PVS-4 - Wikipedia

    en.wikipedia.org/wiki/AN/PVS-4

    Unlike earlier passive starlight weapon scopes the AN/PVS-4 provided a high quality image without significant distortion, could adjust to changing ambient light conditions, was able to take multiple reticles to operate in many roles and had protective features allowing it to shut down in the event of exposure to bright light, but still recover ...