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Iron sights are a system of physical alignment markers used as a sighting device to assist the accurate aiming of ranged weapons such as firearms, airguns, crossbows, and bows, or less commonly as a primitive finder sight for optical telescopes. Iron sights, which are typically made of metal, are the earliest and simplest type of sighting 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 ...
Dovetails are also integrated into some rifles most noticeably the L85A2 and A1 variants of the SA80 bullpup rifle for mounting the iron sights and the SUSAT sighting system. But in recent times it has been changed to Picatinny rail in place of it, as Dovetails were not fit for the purpose of making space for ACOG sighting system, according to ...
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]
The M16 elevated iron sight line has a 19.75 in (502 mm) sight radius. [23] As the M16 series rear sight, front sight and sighting in targets designs were modified over time and non-iron sight (optical) aiming devices and new service ammunition were introduced zeroing procedures changed. [116]
To avoid the projectile shattering or ricocheting when it impacts the ground, a proprietary round-nosed 7.62×51mm bullet was developed for use with the rifle. The rifle could also use regular 7.62mm bullet for combat use. The rifle weights around 4.6–5 kg, has a barrel length of 510 mm (20.1 in) and overall length of 908 mm (35.7 in). [53] [54]
The rifle was designed with an iron sight line consisting of rear receiver aperture battle sight calibrated for .303 British Mk VII ball ammunition at 300 yd (274 m) with an additional ladder aperture sight that could be flipped up and was calibrated for 200–1,000 yd (183–914 m) in 100 yd (91 m) increments and 1,000–1,650 yd (914–1,509 ...
Swiss Army Stgw 57 with erected iron sights and mounted bayonet. The Stgw. 57 has a straight-line stock design, and an elevated iron sights line with a relatively long 635 mm (25.0 in) sight radius. Both the front and rear sights can be folded down when not in use. The rear peep sight of the Stgw. 57 can be adjusted from 100 to 640 m (109 to ...