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- Adjustable_Ranging_Telescope abstract "Developed and patented by James M. Leatherwood, the Adjustable Ranging Telescope (ART) system combines a rangefinding scale inside the telescopic sight (scope) with an adjustable cam built into the scope's mount that raises or lowers the rear of the sight to compensate for the trajectory of the bullet. The cam is preset for a specific cartridge; i.e. the 7.62 mm NATO round. In use, the shooter first adjusts the magnification of the scope such that the ranging brackets subtend the target. Since the range cam is locked to the magnification ring, the range is automatically set and the drop of the shot is accounted for. This then allows the shooter to place the scope's aiming point directly on the target without having to hold over or under to compensate for the bullet's rise and fall.During the Vietnam War, the United States Army found that they desperately needed snipers. They were losing troops to enemy snipers and had no capability of retaliating in kind. Their major problem was that the classic training of a sniper in range estimation, ballistics, compensation for weather or climate variables, and precision shooting is a lengthy process and they didn't have the time. About this time, Lieutenant Leatherwood, who already had the patents for his ART system, entered the Army and began working with U.S. Army Ordnance specialists. The combination of the Leatherwood ART with M14 National Match rifles to produce what became the M21 Sniper Rifle, allowed the Army to place competent snipers in the field with all line units.Modern "civilian" versions of this system are sold by Leatherwood Optics and a more detailed Manual of the scope and its mounting system are available there.".
- Adjustable_Ranging_Telescope wikiPageID "792474".
- Adjustable_Ranging_Telescope wikiPageRevisionID "409982842".
- Adjustable_Ranging_Telescope hasPhotoCollection Adjustable_Ranging_Telescope.
- Adjustable_Ranging_Telescope subject Category:Firearm_sights.
- Adjustable_Ranging_Telescope type Abstraction100002137.
- Adjustable_Ranging_Telescope type Cognition100023271.
- Adjustable_Ranging_Telescope type Content105809192.
- Adjustable_Ranging_Telescope type FirearmSights.
- Adjustable_Ranging_Telescope type Percept105930136.
- Adjustable_Ranging_Telescope type PsychologicalFeature100023100.
- Adjustable_Ranging_Telescope type Representation105926676.
- Adjustable_Ranging_Telescope type Sight105933054.
- Adjustable_Ranging_Telescope type VisualPercept105932477.
- Adjustable_Ranging_Telescope comment "Developed and patented by James M. Leatherwood, the Adjustable Ranging Telescope (ART) system combines a rangefinding scale inside the telescopic sight (scope) with an adjustable cam built into the scope's mount that raises or lowers the rear of the sight to compensate for the trajectory of the bullet. The cam is preset for a specific cartridge; i.e. the 7.62 mm NATO round. In use, the shooter first adjusts the magnification of the scope such that the ranging brackets subtend the target.".
- Adjustable_Ranging_Telescope label "Adjustable Ranging Telescope".
- Adjustable_Ranging_Telescope sameAs m.03chh0.
- Adjustable_Ranging_Telescope sameAs Q4683195.
- Adjustable_Ranging_Telescope sameAs Q4683195.
- Adjustable_Ranging_Telescope sameAs Adjustable_Ranging_Telescope.
- Adjustable_Ranging_Telescope wasDerivedFrom Adjustable_Ranging_Telescope?oldid=409982842.
- Adjustable_Ranging_Telescope isPrimaryTopicOf Adjustable_Ranging_Telescope.