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This is a list of United States Army fire control, and sighting material by supply catalog designation, or Standard Nomenclature List (SNL) group "F". The United States Army Ordnance Corps Supply Catalog used an alpha-numeric nomenclature system from about the mid-1920s to about 1958.
This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. Most commonly reported shapes in UFO sightings gathered by the National UFO Reporting Center Online Database (NUFORC) This is a list of notable reported sightings of unidentified flying objects (UFOs) and related claims of close encounters ...
Officials in the US and Canada began tracking the UFO again when it crossed into Canadian airspace, and Prime Minister Justin Trudeau gave the order to shoot it down just after 4:50 p.m.
The Canadian Federal Government (as of 2007) directs all UFO sightings to Chris Rutkowski of Ufology Research of Manitoba. [40] [41] On July 15, 2018, a Canadian news site mentioned a new study conducted by Ufology Research, formerly known as Ufology Research of Manitoba, stating there were more than 1,000 UFO sightings reported in Canada in ...
US Marines with a 106 mm M40 recoilless rifle, during the Battle of Huế. A spotting rifle or ranging gun is a small-calibre rifle used as a sighting device for artillery.The ballistics of the spotting rifle are matched to those of the artillery piece, [1] so that if a shot from the spotting rifle lands on the target, it may be assumed that the main weapon will also do so.
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]
Telescopic sight (German made ZF Ajack 4×90 (4×38 in modern terminology) for the World War II pattern Swedish sniper rifle m/1941. Russian Model 1891/30 sniper rifle with PU 3.5×21 sight The Zielgerät ZG 1229 Vampir displayed by a British soldier (ca 1945)
Sighting in a firearm is an important test of the ability of the firearm user to hit anticipated targets with available ammunition. Pictures or silhouettes of intended targets are less suitable for sighting in than high contrast shapes compatible with the type of sights on the firearm. Contrasting circles are commonly used as sighting in ...