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The M145 Machine Gun Optic is a variant of the C79 that was developed for the U.S. Army and is commonly mounted on M240 and M249 machine guns. The M145 is unusual when compared with other optical sights in use with the United States military in that ballistic compensation is in the mount, rather than in the reticle.
The scope body is sealed and filled with nitrogen, which prevents fogging of optics and was designed to function within a -50 °C to 50 °C temperature range. For zeroing the telescopic sight the reticle can be adjusted by manipulating the elevation and windage turrets in 5 centimetres (2.0 in) at 100 metres (109 yd) (0.5 mil or 1.72 MOA ...
Elcan SpecterDR 1-4x Scope + Docter MRD (SU-230/PVS) Trijicon ACOG TA31ECOS 4x Scope + Docter MRD (SU-237/PVS) [11] Insight AN/PVS-24 Clip-On Night Vision Device-Image Intensified (CVND-I 2) [12] US Army 75th Rangers using multiple Block II accessories on their rifles at night. Note the Insight WMX 200 light mounted on the rifle of the operator ...
The scope base is the attachment interface on the rifle's receiver, onto which the scope rings or scope mount are fixed. Early telescopic sights almost all have the rings that are fastened directly into tapped screw holes on the receiver, hence having no additional scope base other than the receiver top itself.
Both AN/PAS-13Bs have programmable reticles, allowing the user to match the reticle to the weapon system the sight will be mounted on. Some reticles included in the sight include those designed for the M16 rifle, M4 carbine, M60 machine gun, M240 machine gun, M249, M2 machine gun, MK19, MK47, M24 sniper weapon system, and the GAU-21. The sight ...
For a ring assembly to grip evenly, it is important that the scope rings are circular and coaxial with the scope tube. On ring mounts that grip unevenly, the ring mount can be lapped to prevent uneven pressure when mounting. [15] One scopes made for ring mounts, it is not uncommon to get ring marks when mounting the rings.
US Marine with a M240G machine gun in the Persian Gulf, 2004. Initial engineering development of the AN/PVS-4 was undertaken by Optic Electronic Corporation of Dallas, Texas, in 1975 as a replacement for the Vietnam War era AN/PVS-2 Starlight Scope. In 1976, the first production contract was awarded for 47,074 units, and first deployed in 1978. [1]
Using an LED as a reticle is an innovation that greatly improves the reliability and general usefulness of the sight: there is no need for other optical elements to focus light behind a reticle; the mirror can use a dichroic coating to reflect just the red spectrum, passing through most other light; and the LED itself is solid state and ...