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Why acog over Elcan ?Get an acog instead.
Watch this video when you get some free time.
I have a buddy that was in the marines, his unit got some elcans for their m249s. Anyways, the case said 5.56 reticle on it. Looking through the reticle it said 7.62 and wouldn't hold zero at all. His unit got a bunch of fakes.Watch out for copies/fakes