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Mark III free gun reflector sight mk 9 variant. Another type of optical sight is the reflector (or "reflex") sight, a generally non-magnifying optical device that allows the user to look through a glass element and see a reflection of an illuminated aiming point or some other image superimposed on the field of view. [7]
A view through the Mark III Free Gun Reflector Sight, first produced in 1943, used on British army guns, naval guns, and as a pilot sight and a defensive gun sight on aircraft. The reticle image in this sight is produced by an optical collimator bounced off a beam splitter.
In 1926, the British Army changed its nomenclature; the SMLE became known as the Rifle No. 1 Mk III or III*, with the original MLE and LEC becoming obsolete along with the earlier SMLE models. [37] Many Mk III and III* rifles were converted to .22 rimfire calibre training rifles, and designated Rifle No. 2, of varying marks.
A C79 Optical Sight. 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]
While designed to withstand military operations, the BORS is also available for civilian sale and can be used by long-range marksmen including target shooters and hunters. [1] The BORS was used by Ukrainian forces in the 2022 Russian invasion of Ukraine, a unit fitted onto a Barrett M107A1 rifle was captured by Russian forces. [2]
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The pilot/gunner had to look into the narrow field folded prismatic telescopic sight at the top of the device, a drawback corrected in the later Mark II. After tests with two experimental gyro gunsights which had begun in 1939, the first production gyro gunsight was the British Mark I Gyro Sight, developed at Farnborough in 1941.
The Mark III and other expanding versions of the .303 were not issued during the Second Boer War (1899–1902). Boer guerrillas allegedly used expanding hunting ammunition against the British during the war, and New Zealand Commonwealth troops may have brought Mark III rounds with them privately after the Hague Convention without authorization ...