Sights M16 rifle

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soldier fires m16a2. note: upper receiver showing carrying handle , rear sight



m16a2 rear sight


the m16 s distinctive ergonomic feature carrying handle , rear sight assembly on top of receiver. by-product of original design, carry handle served protect charging handle. line of sight 2.5 in (63.5 mm) on bore, m16 has inherent parallax problem. @ closer ranges (typically inside 15–20 meters), shooter must compensate aiming high place shots desired. m16 has 500 mm (19.75 inches) sight radius. m16 uses l-type flip, aperture rear sight , adjustable 2 settings, 0 300 meters , 300 400 meters. front sight post adjustable elevation in field. rear sight can adjusted in field windage. sights can adjusted bullet tip or pointed tool, troops trained 0 own rifles. sight picture same m14, m1 garand, m1 carbine , m1917 enfield. m16 has low light level sight system , includes front sight post small glass vial of (glow-in-the-dark) radioactive tritium h3 , larger aperture rear sight. m16 can mount scope on carrying handle. advent of m16a2, new adjustable rear sight added, allowing rear sight dialed in specific range settings between 300 , 800 meters , allow windage adjustments without need of tool or cartridge. modern versions such m16a4 use picatinny rails, allows use of various scopes , sighting devices. current united states army , air force issue m4 carbine comes m68 close combat optic , back-up iron sight. united states marine corps uses acog rifle combat optic , united states navy uses eotech holographic weapon sight.








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