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F1 Major items, small arms, automatic gun, trench mortar, and field artillery sighting equipment, and fire control instruments; F2 Major items, harbor defense, railway, and antiaircraft artillery sighting equipment, and fire-control instruments; F3 Items not authorized for general issue; F4 Rule, slide, M1917 – Parts and equipment
The Advanced Combat Optical Gunsight (ACOG) is a series of prismatic telescopic sights manufactured by Trijicon. The ACOG was originally designed to be used on the M16 rifle and M4 carbine, but Trijicon has also developed ACOG accessories for other firearms. Models provide fixed-power magnification levels from 1.25× to 6×. [1]
The C79 optical sight (SpecterOS3.4x) is a telescopic sight manufactured by Elcan. A variant, the M145 Machine Gun Optic is in use by the US military. It is 3.4×28, meaning 3.4x magnification, and a 28mm diameter objective lens. A tritium illuminated reticle provides for normal and low-light conditions sighting. [1]
The automatic kind will also lower when the ignition switch is turned off. Unlike most car antennas adjusted directly by hand, power antennas retract completely beneath the surface that they are mounted on. This convenience could be found on most luxury cars by the late-1950s. The automatic power antenna became much more common in the 1970s. [1]
Infantry, light armoured vehicles, defensive fortifications: Available as point detonating (GPE-PD-T) or airburst munition (GPE-AB-T) A3B-T Anti Aerial Airburst - Tracer 1,400 900 - 4,000 Unmanned aerial vehicles, light aircraft, helicopters: TP-T Target Practice - Tracer 980 1,000 - 8,500 - TPRR-T Target Practice Reduced Range - Tracer 730 ...
The left most position is the fire position and a cut out permits movement of the firing pin and the bolt can be cycled. The safety catch lever is quite large, making it easy to operate, but posing a problem for mounting telescopic sights low above the receiver whilst retaining good operability of the safety catch lever.
Telescoping in mechanics describes the movement of one part sliding out from another, lengthening an object (such as a telescope or the lift arm of an aerial work platform) from its rest state. [1] In modern equipment this can be achieved by a hydraulics , but pulleys are generally used for simpler designs such as extendable ladders and amateur ...
They can be telescopic in nature or prismatic. Generally prismatic beam expanders use several prisms and are known as multiple-prism beam expanders. Telescopic beam expanders include refracting and reflective telescopes. [1] A refracting telescope commonly used is the Galilean telescope which can function as a simple beam expander for ...
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