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The mid to late 70s saw the introduction of what are usually referred to as "red dot sights", a type that gives the user a simple bright red dot as an aiming point.[34] The typical configuration for this sight is a compact curved mirror reflector design with a red Light-emitting diode (LED) at its focus. Using an LED as a reticle is an innovation that greatly improves the reliability and general usefulness of the sight. There is no need for other optical elements to focus light behind a reticle. The mirror can use a dichroic coating to reflect just the red spectrum allowing it to pass through most other light. The LED itself is solid state and consumes very little power, allowing battery powered sights to run for hundreds and even tens of thousands of hours.
Reflector sights for military firearms (usually referred to by the abbreviation reflex sight) took a long time to be adopted. The US House Committee on Armed Services noted as far back as 1975 on the suitability of the use of reflex sight for the M16[35] but the US military did not introduce a reflector sights until 2000 with the Aimpoint CompM2 red dot sight, designated the M68 Close Combat Optic
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จากเกมส์ Call of Duty: Black Ops ชุดทหารในรูปมีจริงๆหรือเปล่าครับ
