![]() Your fingertip will appear to have moved, even though no movement has actually taken place. An example can be illustrated by holding up your hand with the index finger pointing up, close one eye, then rapidly open and close the other eye. Parallax is the apparent shift of an object. The CCO is designed to be parallax-free at distances exceeding fifty meters. This increases the Paratrooper’s depth of field and perception of cues in their sector. Reflex- or red-dot sights, are designed to be fired with both eyes open. The reason we want it here and not closer to the firer is because the CCO is a Reflex sight. As you can see in photo two, the optic is placed on the rail with the front end of the rail mount flush with the upper receiver. For this discussion, we will be talking about the Comp M2/M3 Variants. To Zero the M68, we have to ensure that it is mounted properly first. It is the sighting system for the M4/M16 family of weapons with the highest population across the United States Army. ![]() To recap our discussion from last week, the close combat optic (CCO), M68 is a non-telescopic (unmagnified) reflex sight that is designed for the “eyes-open” method of sighting. ![]() The reference for this is TM 9-1240-413-13P dated May 2013, and TC 3-22.9, Change 1 dated January 2017 ![]() We are continuing our discussion on the M68 Close Combat Optic, or CCO. ![]()
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