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2. Picatinny rail - Wikipedia

   en.wikipedia.org/wiki/Picatinny_rail

   [citation needed] Many accessories can be secured to a rail with a single spring-loaded retaining pin. Designed to mount heavy sights of various kinds, a great variety of accessories and attachments are now available and the rails are no longer confined to the rear upper surface of long arms but are either fitted to or machine milled into the ...

3. Dovetail rail - Wikipedia

   en.wikipedia.org/wiki/Dovetail_rail

   The SIG Sauer 200 STR has an 11 mm dovetail on the receiver for mounting a diopter rear sight or a scope sight, either directly or via a Picatinny rail adapter.. Dovetails come in several different types and sizes depending on manufacturer, but the most common are the 11 mm and 3 ⁄ 8 inch (9.5 mm).

4. Telescopic sight - Wikipedia

   en.wikipedia.org/wiki/Telescopic_sight

   Telescopic sights with variable magnifications appeared later, and were varied by manually adjusting a zoom mechanism behind the erector lenses. Variable-power sights offer more flexibility when shooting at varying distances, target sizes and light conditions, and offer a relative wide field of view at lower

5. Compound bow - Wikipedia

   en.wikipedia.org/wiki/Compound_bow

   In modern archery, a compound bow is a bow that uses a levering system, usually of cables and pulleys, to bend the limbs. [1] The compound bow was first developed in 1966 by Holless Wilbur Allen in North Kansas City, Missouri, and a US patent was granted in 1969. Compound bows are widely used in target practice and hunting.

6. Three-point hitch - Wikipedia

   en.wikipedia.org/wiki/Three-point_hitch

   The implement is secured by placing a pin on the ends of the posts. The hitch lifting arms are powered by the tractor's own hydraulic system. The hydraulic system is controlled by the operator, and usually a variety of settings are available. A draft control mechanism is often present in modern three-point hitch systems.

7. Diopter sight - Wikipedia

   en.wikipedia.org/wiki/Diopter_sight

   The diopter sight is easy to use and usually allows for very accurate aiming, because a relative long sighting line can be used. A long sighting line helps to reduce eventual angle errors and will, in case the sight has an incremental adjustment mechanism, adjust in smaller increments when compared to a further identical shorter sighting line.

8. 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]

9. Reflector sight - Wikipedia

   en.wikipedia.org/wiki/Reflector_sight

   A reflector sight or reflex sight is an optical sight that allows the user to look through a ... [17] [18] The reflector sight's single, parallax-free virtual image ...