Concept Of Zeroing M16A1 and M16A2 Rifle Marksmanship
The purpose of battlesight zeroing is to align the fire control system (sights) with the rifle barrel, considering the given ammunition ballistics. When this is accomplished correctly, the fire control and point of aim are point of impact at a standard battlesight zero range such as 250 (300) meters. When a rifle is zeroed, the sights are adjusted so that bullet strike is the same as point of aim at some given range. A battlesight zero (250 meters, M16A1 300 meters, M16A2) is the sight setting…
Source: http://www.bevfitchett.us/m16a1-m16a2-rifle-marksmanship/concept-of-zeroing.html
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