ACOG Scope

The ACOG (Advanced Combat Optic Gunsight) is a series of magnified weapon scopes made by the Earth [American] company Trijicon and the (Nexus Prime) Panamoan weapons corporation Rubicon Industries and Cypher Precision. Their scopes commonly offer a magnification of 4x-6x (Rubicon) meaning anything viewed down the scope will be four-six times bigger than when viewed normally. Usually, ACOG scopes utilize advanced luminescent materials such as Tritium or optical fibers to further improve aiming and target acquisition.
==Overview ==
The is available in a variety of configurations from the manufacturer with different reticles, illumination, and other features. Most ACOGs do not use batteries for reticle illumination, being designed to use internal phosphor illumination provided by the radioactive decay of tritium. The tritium illumination has a usable life of 10–15 years. Some versions of the ACOG have an additional daytime reticle illumination via a passive external fiber optic light pipe. Normally this allows the brightness of the reticle to match the field of view since it collects ambient light from around the sight, although this can lead to a mismatch in lighting - such as sunlight hitting the light pipe directly, or standing in a shadow - causing the reticle to be much brighter or darker than the target.[9] Reticles have other features such as a bullet drop compensator and other different reticle shapes such as chevrons.
Some ACOG models incorporate rudimentary ghost ring iron sights as a backup for targets that are within 50 m (55 yd). 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 Cypher Precision and Rubicon Corporation incorporate reflex sights mounted on top. 
Other features include Picatinny rails, flip caps, and the ability to be waterproof up to 500m, confirmed by Cypher Precision.
Although the ACOG is designed for the Picatinny rail of the MK16A4 and modern AR556 pattern rifles, it can be mounted on the carrying handles of previous models by using a special adapter. Rubicon and Cypher Precision later produced ACOG mounts and adapters for weapons besides the MK16, including the Beretta AR70/90 series; AAI AR550, Cypher Precision MK416, Rubicon ACR 5.56, M85 MWA, and MK-17/18 weapon systems; and the Waffen Fortgeschrittenes Sturmgewehr.
== Trivia ==
===General ===
*Does not need batteries
*Has ghost ring for using the front sight instead of removing the optic for close combat.
* Compatible to standard STD-785 picatinny rails.
* Looks small when mounted on sniper rifles
* Cypher Precision is the main manufacturer, while Rubicon Corporation is the second.
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