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2. Diopter sight - Wikipedia

   en.wikipedia.org/wiki/Diopter_sight

   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 also producing beneficial optical effects for accurate aiming.

3. Iron sights - Wikipedia

   en.wikipedia.org/wiki/Iron_sights

   Front sights vary in design but are often a small post, bead, ramp, or ring. There are two main types of rear iron sight: 'open sights', which use an unenclosed notch, and 'aperture sights', which use a circular hole. Nearly all handguns, as well as most civilian, hunting, and police long guns, feature open sights.

4. Advanced Combat Optical Gunsight - Wikipedia

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

   Most ACOG models, when mounted to a carry handle, have an open space through the mount to allow the use of the rifle's iron sights without removing the scope. [ citation needed ] Others include Docter or Trijicon [ 10 ] reflex sights mounted on top, such as the TA11SDO (SU-258/PVQ) and the TA648MGO (SU-260P). [ 11 ]

5. Archery - Wikipedia

   en.wikipedia.org/wiki/Archery

   Around the tenth century the crossbow was introduced in Europe. Crossbows generally had a longer range, greater accuracy and more penetration than the shortbow, but suffered from a much slower rate of fire. Crossbows were used in the early Crusades, with models having a range of 274 m (899 ft) and being able to penetrate armour or kill a horse ...

6. Sight (device) - Wikipedia

   en.wikipedia.org/wiki/Sight_(device)

   On weapons, these sights are usually formed by rugged metal parts, giving them the name "iron sights", [4] as distinct from optical or computing sights. [5] On many types of weapons they are built-in and may be fixed, adjustable, or marked for elevation , windage , target speed, etc. [ 3 ] They are also classified in forms of notch (open sight ...

7. Reflector sight - Wikipedia

   en.wikipedia.org/wiki/Reflector_sight

   Open sights (also known as "mini reflex sights" and "mini red dots") take advantage of the fact that the reflector sight's only optical element, the optical window, does not need any housing at all. This configuration consists of a base with just the necessary reflective surface for collimating the reticle mounted on it.