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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.
Originally (from 1889) Martini–Henry conversions used Metford rifled barrels (and were known as Martini–Metford rifles), which were more than suitable for the first .303 cartridges, which used black powder as a propellant but wore out very quickly when fired with cordite/nitrocellulose cartridges (introduced in 1895). In 1895, the Enfield ...
The Mark II had a tendency to split at the base, so the Cartridge S.A. Ball Martini Henry Rifle Rolled Case Mark III was developed which had two layers of .004 in brass overlapped by .5 in (13 mm) with a .004 in brass strengthening strip with a small sight hole punched in the outer coil as a visual check that the strip was correctly placed and ...
Some models of the rifle have a bayonet lug for an experimental shortened version of the bayonet pattern 1907 of the Lee-Enfield Mark III rifle. The Farquhar-Hill was first patented in the UK in 1908 and in the United States in 1909. The key feature was an intermediate 'action' spring which stored recoil energy.
The Mark III rifles were newly made. They featured steel barrels which were so marked, flat nosed hammers, and a latch-locking breech block instead of the simple integral block lifting tang. The Snider–Enfield used a new type of metal-cased cartridge called a Boxer cartridge after its designer.
The Mark VII loading used a 174 gr (11.28 g) pointed bullet with a flat-base. The .303 British Mark VII cartridge was loaded with 37 gr (2.40 g) of Cordite MDT 5-2 (cordite MD pressed into tubes) and had a muzzle velocity of 2,440 ft/s (744 m/s) and a maximum range of approximately 3,000 yd (2,700 m).
Canon EOS-1D Mark III; Canon EOS-1Ds Mark III; Harvard Mark III, an early computer built at Harvard University and used by the US Navy; Mesa Boogie Mark III, an electric guitar amplifier; Sega Mark III, the original Japanese branding of Sega Master System, a video game console; Vox Mark III, a teardrop-shaped electric guitar of the 1960s