The ACOG might have the FO and tritium or use a AA battery to light up the reticle. However the eyebox will get really restricted to the 4x ACOG, and you also’ve limited it to a fixed energy scope. The five.5x ACOG is good, but really significant/bulky and adds bodyweight. https://bookmark-search.com/story18488213/details-fiction-and-rtp-slot