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Adjustable rear sight The Infanteriegewehr Modell 1842 (English: Infantry rifle, type 1842 ) was one of the first standardised service rifles used by the Swiss armed forces . It was introduced in 1842 as a result of a decision by the authorities of the Old Swiss Confederacy to standardise the weapons of the then still separate armies of the ...
Sights Adjustable ramp rear sights, fixed blade front sight The Enfield Pattern 1853 rifle-musket (also known as the Pattern 1853 Enfield , P53 Enfield , and Enfield rifle-musket ) was a .577 calibre Minié-type muzzle-loading rifled musket , used by the British Empire from 1853 to 1867; after which many were replaced in service by the ...
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.
The AK-104 uses an adjustable notched rear tangent iron sight calibrated in 100 m (109 yd) increments from 100 to 500 m (109 to 547 yd). The front sight is a post adjustable for elevation in the field. Horizontal adjustment is done by the armory before issue. The AK-104 has a muzzle booster derived from the AKS-74U. [2]
The rifle comes with adjustable iron sights, consisting of a forward post and an L-shaped dual-aperture rear flip sight with settings for firing at ranges of 150 and 300 m. [1] The front sight, corrected for windage and elevation, is mounted in a semi-shrouded post on top of the gas block, and the rear sight—on the receiver top cover.
The rear sight can be zeroed for windage in 3.8 cm or 0.38 mrad increments at 100 m, when used with a 367 mm (14.45 in) carbine length sight radius. Elevation can be zeroed in 4.7 cm or 0.47 mrad increments at 100 m. Once the iron sight line is zeroed, the front sight post and rear sight should not be moved. [3] [4]
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 ...
The barrel is threaded at the muzzle, and can be mounted with accessories, such as a flash-hider. The front sight, which is an M-16 adjustable-post type, is incorporated over the gas block and is not removable. [3] The C also includes a reciprocating dust cover over the ejection port and a case-deflecting charging handle. [3]
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