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  2. Heckler & Koch G3 - Wikipedia

    en.wikipedia.org/wiki/Heckler_&_Koch_G3

    G3A2: G3 developed in 1962 with new rotating drum rear sight and a Freischwinger (FS) free-floating barrel that significantly improved accuracy. G3A3 : The most well known 1963 version. Drum sights with an improved front sight, a flash-suppressor/muzzle brake capable of firing NATO standard grenades, a fixed solid plastic buttstock, and a ...

  3. 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.

  4. Heckler & Koch HK33 - Wikipedia

    en.wikipedia.org/wiki/Heckler_&_Koch_HK33

    Rotary rear aperture drum, hooded foresight Peruvian police "Los Sinchis" operative with HK33 assault rifle and HK79 Grenade Launcher at SITDEF 2023. The Heckler & Koch HK33 is a 5.56mm assault rifle developed in the 1960s by West German armament manufacturer Heckler & Koch GmbH (H&K), primarily for export.

  5. Heckler & Koch HK43 - Wikipedia

    en.wikipedia.org/wiki/Heckler_&_Koch_HK43

    The HK43 was created in 1974 as a semi-automatic version of the HK33 (which itself was a scaled down version of the Heckler & Koch G3, but chambered for 5.56×45mm NATO). [1] According to H&K's numbering nomenclature, the "4" indicates that the weapon is a paramilitary rifle, and the "3" indicates that the caliber is 5.56 mm.

  6. Heckler & Koch HK21 - Wikipedia

    en.wikipedia.org/wiki/Heckler_&_Koch_HK21

    The firearm is equipped with an iron sight line that consist of a rotary rear drum and hooded front post. The rear aperture sight is mechanically adjustable for both windage and elevation from 100 to 1,200 metres (109 to 1,312 yd) in 100-metre (109 yd) increments for 7.62×51mm NATO models or 100 to 1,000 metres (109 to 1,094 yd) in 100-metre ...

  7. Heckler & Koch G41 - Wikipedia

    en.wikipedia.org/wiki/Heckler_&_Koch_G41

    The Heckler & Koch G41 is a German 5.56×45mm NATO assault rifle introduced in 1981 and produced in limited quantities by Heckler & Koch.It was designed to replace the 7.62×51mm NATO chambered Heckler & Koch G3 and the G3 based .223 Remington/5.56×45mm and later 5.56×45mm NATO chambered Heckler & Koch HK33 service rifles providing a more modern weapon compatible with then recently ...